[SWR] Pit in Magdalena
Does anyone know about this? http://www.kob.com/article/stories/S2698021.shtml?cat=648 Lee Skinner ___ SWR mailing list s...@caver.net http://lists.caver.net/cgi-bin/mailman/listinfo/swr ___ This list is provided free as a courtesy of CAVERNET
Re: [SWR] Pit in Magdalena
News to me. Lots of mining activity around Magdalena. Could be an old mine tunnel that collapsed. On Jul 21, 2012, at 8:33 AM, Lee H. Skinner wrote: Does anyone know about this? http://www.kob.com/article/stories/S2698021.shtml?cat=648 Lee Skinner ___ SWR mailing list s...@caver.net http://lists.caver.net/cgi-bin/mailman/listinfo/swr ___ This list is provided free as a courtesy of CAVERNET Steve Peerman Twenty years from now you will be more disappointed by the things you didn't do than by the ones you did. So throw off the bowlines, Sail away from the safe harbor. Catch the trade winds in your sails. Explore. Dream. Discover. attributed to Mark Twain, but no record exists of his having written this. ___ SWR mailing list s...@caver.net http://lists.caver.net/cgi-bin/mailman/listinfo/swr ___ This list is provided free as a courtesy of CAVERNET
Re: [SWR] Pit in Magdalena
Personally, I think it's just a cover up for a greater conspiracy going on there…….. On the other hand, it could just be a sinkhole or mine tunnel, and worth looking into. Has anyone from the SWR contacted these folks yet? On Jul 21, 2012, at 9:20 AM, Steve Peerman wrote: News to me. Lots of mining activity around Magdalena. Could be an old mine tunnel that collapsed. On Jul 21, 2012, at 8:33 AM, Lee H. Skinner wrote: Does anyone know about this? http://www.kob.com/article/stories/S2698021.shtml?cat=648 Lee Skinner ___ SWR mailing list s...@caver.net http://lists.caver.net/cgi-bin/mailman/listinfo/swr ___ This list is provided free as a courtesy of CAVERNET Steve Peerman Twenty years from now you will be more disappointed by the things you didn't do than by the ones you did. So throw off the bowlines, Sail away from the safe harbor. Catch the trade winds in your sails. Explore. Dream. Discover. attributed to Mark Twain, but no record exists of his having written this. ___ SWR mailing list s...@caver.net http://lists.caver.net/cgi-bin/mailman/listinfo/swr ___ This list is provided free as a courtesy of CAVERNET ___ SWR mailing list s...@caver.net http://lists.caver.net/cgi-bin/mailman/listinfo/swr ___ This list is provided free as a courtesy of CAVERNET
Re: [SWR] Pit in Magdalena
If you project the passage, it's the end of Snowy River. On 07/21/2012 9:20, Steve Peerman wrote: News to me. Lots of mining activity around Magdalena. Could be an old mine tunnel that collapsed. On Jul 21, 2012, at 8:33 AM, Lee H. Skinner wrote: Does anyone know about this? http://www.kob.com/article/stories/S2698021.shtml?cat=648 Lee Skinner ___ SWR mailing list s...@caver.net http://lists.caver.net/cgi-bin/mailman/listinfo/swr ___ This list is provided free as a courtesy of CAVERNET
[Texascavers] halogen lamps
Halogen lamps are so more efficient than ordinary incandescent lamps, because they run at a higher temperature and put out more lumens per watt. Sure, every lamp, even an LED, ultimately creates one watt of heat per watt of input, but the question is how much of the energy is useful light on the way to becoming heat. LEDs aren't as much more efficient than other lights as most people think. They seem brighter because their output is inherently focused. They aren't really more efficient than compact fluorescents for area lighting. Halogen bulbs might be an inexpensive substitute for ordinary light bulbs once the clowns in Washington have outlawed the 25-cent kind. -- Mixon --Mixon Forgive your enemies . . . after they are hanged. You may reply to the address this message came from, but for long-term use, save: Personal: bmi...@alumni.uchicago.edu AMCS: edi...@amcs-pubs.org or sa...@amcs-pubs.org - Visit our website: http://texascavers.com To unsubscribe, e-mail: texascavers-unsubscr...@texascavers.com For additional commands, e-mail: texascavers-h...@texascavers.com
Re: [Texascavers] halogen lamps
As a cave manager, I would be more concerned with which type of bulb would reduce (eliminate??) the algal growth on the formations that are near the heat of the lamp. julia -Original Message- From: Mixon Bill bmixon...@austin.rr.com To: Cavers Texas texascavers@texascavers.com Sent: Sat, Jul 21, 2012 11:50 am Subject: [Texascavers] halogen lamps Halogen lamps are so more efficient than ordinary incandescent lamps, because they run at a higher temperature and put out more lumens per watt. Sure, every lamp, even an LED, ultimately creates one watt of heat per watt of input, but the question is how much of the energy is useful light on the way to becoming heat. LEDs aren't as much more efficient than other lights as most people think. They seem brighter because their output is inherently focused. They aren't really more efficient than compact fluorescents for area lighting. Halogen bulbs might be an inexpensive substitute for ordinary light bulbs once the clowns in Washington have outlawed the 25-cent kind. -- Mixon --Mixon Forgive your enemies . . . after they are hanged. You may reply to the address this message came from, but for long-term use, save: Personal: bmi...@alumni.uchicago.edu AMCS: edi...@amcs-pubs.org or sa...@amcs-pubs.org - Visit our website: http://texascavers.com To unsubscribe, e-mail: texascavers-unsubscr...@texascavers.com For additional commands, e-mail: texascavers-h...@texascavers.com
Re: [Texascavers] halogen lamps
Bill you are way behind the times on LED tech. Old school tungsten lamps are 8-20 lumens per watt, as the wattage goes up so does the lumens per watt up to about 35 for projection lamps. Halogen lamps are better then the lower wattage bulbs, at 9-25 lumens per watt. Compact fluorescents typically have 50-70 lumens per watt Regular T5 straight Florescent bulbs run 70-105 lumens per watt Low pressure sodium (yellow street light) have a lumens per watt of ~200, Currently available White LED's from CREE have a lumens per watt of 260 lumens per watt (this is the LED chip used in the Scurion and other of the newer caving lamps) and it is now standard for many LED's available to have lumens per watt in the 100-200 range. When looking at the costs of replacing a whole system of lamps, the bulbs efficiency is often the last thing to worry about, wiring costs, voltage/transformer costs and replacment are bigger factors for the average Joe LED tech is still in a state of rapid development so the bulbs they would buy today may not be avalable nect year, and many of the light manufacturing companys have stopped putting money into CFL development and have instead switched to LED as that is were the future is in lighting (at least on any commercial scale) Terry H. On 7/21/2012 11:50 AM, Mixon Bill wrote: Halogen lamps are so more efficient than ordinary incandescent lamps, because they run at a higher temperature and put out more lumens per watt. Sure, every lamp, even an LED, ultimately creates one watt of heat per watt of input, but the question is how much of the energy is useful light on the way to becoming heat. LEDs aren't as much more efficient than other lights as most people think. They seem brighter because their output is inherently focused. They aren't really more efficient than compact fluorescents for area lighting. Halogen bulbs might be an inexpensive substitute for ordinary light bulbs once the clowns in Washington have outlawed the 25-cent kind. -- Mixon --Mixon Forgive your enemies . . . after they are hanged. You may reply to the address this message came from, but for long-term use, save: Personal: bmi...@alumni.uchicago.edu AMCS: edi...@amcs-pubs.org or sa...@amcs-pubs.org - Visit our website: http://texascavers.com To unsubscribe, e-mail: texascavers-unsubscr...@texascavers.com For additional commands, e-mail: texascavers-h...@texascavers.com - Visit our website: http://texascavers.com To unsubscribe, e-mail: texascavers-unsubscr...@texascavers.com For additional commands, e-mail: texascavers-h...@texascavers.com
[Texascavers] Updated TSA Members List
Hello-I have (separately) emailed the revised TSA members list. If you are a TSA member (dues paid) and did not get it, please email me off list. Thanks, Denise Prendergast TSA Secretary
Re: [Texascavers] Updated TSA Members List
YOU ROCK, DENISE! Having done something similar for a 25 year old organization was a chore. I can only imagine the fun you had with this project! Thanks so much for taking care of the members. We really appreciate it :) julia -Original Message- From: Logan McNatt lmcn...@austin.rr.com To: Denise P pepabe...@hotmail.com Cc: TexasCavers texascavers@texascavers.com Sent: Sat, Jul 21, 2012 9:22 am Subject: Re: [Texascavers] Updated TSA Members List Denise deserves a big THANK YOU from all the members of the TSA forthe time and effort she spent putting together this list! THANKS DENISE! Logan On 7/21/2012 5:46 AM, Denise P wrote: Hello-I have (separately) emailed the revised TSA members list. If you are a TSA member (dues paid) and did not get it, pleaseemail me off list. Thanks, Denise Prendergast TSA Secretary
Re: [Texascavers] Updated TSA Members List
I agree it is a good job. Thanks Sheryl
Revised TSA Members List
Hello-Attached is the updated list. Enjoy! - Denise Prendergast TSA Secretary TSA Members List 2012-07 REV 1.pdf Description: Adobe PDF document
Re: [Texascavers] HALOGEN lighting system at Longhorn Caverns?
Don, I just called Longhorn Caverns and the person who answered asked one of the tour guides if the new lighting system is halogen or LED. The guide said it is halogen. Same for the description of the new lighting system in the June 21st TPWD press release that can be accessed at the TPWD website or the Longhorn Cavern website (link below). http://www.longhorncaverns.com/pdf/Longhorn_Caverns_New_Lighting.pdf On 7/20/2012 7:06 PM, Don Cooper wrote: Apologies for not staying in closer tune with the details, but the KVUE weather channel news ticker mentioned a new HALOGEN lighting system at Longhorn Caverns... I cannot see how that would POSSIBLY be an energy efficient and less-heat generating lighting option. Please confirm that they are as clueless as they seem - and the new light system is LED based! -WaV - Visit our website: http://texascavers.com To unsubscribe, e-mail: texascavers-unsubscr...@texascavers.com For additional commands, e-mail: texascavers-h...@texascavers.com - Visit our website: http://texascavers.com To unsubscribe, e-mail: texascavers-unsubscr...@texascavers.com For additional commands, e-mail: texascavers-h...@texascavers.com
Re: [Texascavers] HALOGEN lighting system at Longhorn Caverns?
Yeah - I've gone back over it and yes, it is 12V Halogen. In my experience - halogen lighting produces very yellow and very hot bulbs. I don't get it - but apparently, yeah. They are halogen. Not LED, which it would seem would be the most efficient and lowest heat producing light source! -WaV On Sat, Jul 21, 2012 at 9:43 AM, Logan McNatt lmcn...@austin.rr.com wrote: Don, I just called Longhorn Caverns and the person who answered asked one of the tour guides if the new lighting system is halogen or LED. The guide said it is halogen. Same for the description of the new lighting system in the June 21st TPWD press release that can be accessed at the TPWD website or the Longhorn Cavern website (link below). http://www.longhorncaverns.com/pdf/Longhorn_Caverns_New_Lighting.pdf On 7/20/2012 7:06 PM, Don Cooper wrote: Apologies for not staying in closer tune with the details, but the KVUE weather channel news ticker mentioned a new HALOGEN lighting system at Longhorn Caverns... I cannot see how that would POSSIBLY be an energy efficient and less-heat generating lighting option. Please confirm that they are as clueless as they seem - and the new light system is LED based! -WaV - Visit our website: http://texascavers.com To unsubscribe, e-mail: texascavers-unsubscr...@texascavers.com For additional commands, e-mail: texascavers-h...@texascavers.com - Visit our website: http://texascavers.com To unsubscribe, e-mail: texascavers-unsubscr...@texascavers.com For additional commands, e-mail: texascavers-h...@texascavers.com
Re: [Texascavers] HALOGEN lighting system at Longhorn Caverns?
Don, Also the most expensive. We looked at LED when lighting the South Cavern at Natural Bridge. We felt that it's not quite there yet, and at between $60 to $120 per bulb, it simply was not feasible. What we went with is a 12-volt system which does use less power to illuminate the cavern. We are still looking at them as it seems each year the costs keep coming down. Plus there are some incredible systems which would give us interpretive tools which simply haven't existed until now. And going with a full LED system would allow you to run the entire lighting system off of solar panels, thus taking a commercial tour off the grid, so to speak. This is also something we are watching. My experience with halogen is that yes, they burn hot, but if you take the time to design the overall system, your lights are only on when people are actually in a given room or passage and then turned off upon leaving. We also purposefully chose to keep much of the cavern dark. But again, this is a choice made by the installers/owners/operators. We no longer feel it necessary to light up every blessed square inch of cave. If we could go back and relight the North Caverns (and we intend to do so at some point), we would likely remove a significant portion of the ambient light. Doing so is better for the cavern, and we feel it also produces a better experience for the guest. We haven't seen any issues arise with the halogens in the South Cavern. The one drawback with that heat is that calcite will deposit quickly on the lenses of the fixtures. If not maintained, the quality of light from the fixture deteriorates. The fixtures even survived full submersion when part of the cave filled with water back in 2007. I feel that the color of the light gets in to a subjective argument. We feel that halogen actually produces a better color for Natural Bridge over incandescent, and much better than compact fluorescent. To my eye, halogen is more white, thus I feel it produces as neutral a light as possible, if that makes sense. But again, this also goes to what you are attempting to illuminate. The color of the light created by a given bulb can actually enhance a cave scene, depending on the natural colors present within the rock. That's one interesting thing about LED bulbs is that some manufacturers will let us create a bulb with different numbers of blue/white/yellow/red LEDs. Personally, I tend to shy away from doing so as it's not too many steps away from full-on tecno-color-rama of red, blue, purple, and green lights found in some show caves. And that just hurts my feelings, along with my eyes. Brian Vauter Natural Bridge Caverns On Sat, Jul 21, 2012 at 6:33 PM, Don Cooper wavyca...@gmail.com wrote: Yeah - I've gone back over it and yes, it is 12V Halogen. In my experience - halogen lighting produces very yellow and very hot bulbs. I don't get it - but apparently, yeah. They are halogen. Not LED, which it would seem would be the most efficient and lowest heat producing light source! -WaV On Sat, Jul 21, 2012 at 9:43 AM, Logan McNatt lmcn...@austin.rr.com wrote: Don, I just called Longhorn Caverns and the person who answered asked one of the tour guides if the new lighting system is halogen or LED. The guide said it is halogen. Same for the description of the new lighting system in the June 21st TPWD press release that can be accessed at the TPWD website or the Longhorn Cavern website (link below). http://www.longhorncaverns.com/pdf/Longhorn_Caverns_New_Lighting.pdf On 7/20/2012 7:06 PM, Don Cooper wrote: Apologies for not staying in closer tune with the details, but the KVUE weather channel news ticker mentioned a new HALOGEN lighting system at Longhorn Caverns... I cannot see how that would POSSIBLY be an energy efficient and less-heat generating lighting option. Please confirm that they are as clueless as they seem - and the new light system is LED based! -WaV - Visit our website: http://texascavers.com To unsubscribe, e-mail: texascavers-unsubscr...@texascavers.com For additional commands, e-mail: texascavers-h...@texascavers.com - Visit our website: http://texascavers.com To unsubscribe, e-mail: texascavers-unsubscr...@texascavers.com For additional commands, e-mail: texascavers-h...@texascavers.com
[SWR] Pit in Magdalena
Does anyone know about this? http://www.kob.com/article/stories/S2698021.shtml?cat=648 Lee Skinner ___ SWR mailing list s...@caver.net http://lists.caver.net/cgi-bin/mailman/listinfo/swr ___ This list is provided free as a courtesy of CAVERNET
Re: [SWR] Pit in Magdalena
News to me. Lots of mining activity around Magdalena. Could be an old mine tunnel that collapsed. On Jul 21, 2012, at 8:33 AM, Lee H. Skinner wrote: Does anyone know about this? http://www.kob.com/article/stories/S2698021.shtml?cat=648 Lee Skinner ___ SWR mailing list s...@caver.net http://lists.caver.net/cgi-bin/mailman/listinfo/swr ___ This list is provided free as a courtesy of CAVERNET Steve Peerman Twenty years from now you will be more disappointed by the things you didn't do than by the ones you did. So throw off the bowlines, Sail away from the safe harbor. Catch the trade winds in your sails. Explore. Dream. Discover. attributed to Mark Twain, but no record exists of his having written this. ___ SWR mailing list s...@caver.net http://lists.caver.net/cgi-bin/mailman/listinfo/swr ___ This list is provided free as a courtesy of CAVERNET
Re: [SWR] Pit in Magdalena
Personally, I think it's just a cover up for a greater conspiracy going on there…….. On the other hand, it could just be a sinkhole or mine tunnel, and worth looking into. Has anyone from the SWR contacted these folks yet? On Jul 21, 2012, at 9:20 AM, Steve Peerman wrote: News to me. Lots of mining activity around Magdalena. Could be an old mine tunnel that collapsed. On Jul 21, 2012, at 8:33 AM, Lee H. Skinner wrote: Does anyone know about this? http://www.kob.com/article/stories/S2698021.shtml?cat=648 Lee Skinner ___ SWR mailing list s...@caver.net http://lists.caver.net/cgi-bin/mailman/listinfo/swr ___ This list is provided free as a courtesy of CAVERNET Steve Peerman Twenty years from now you will be more disappointed by the things you didn't do than by the ones you did. So throw off the bowlines, Sail away from the safe harbor. Catch the trade winds in your sails. Explore. Dream. Discover. attributed to Mark Twain, but no record exists of his having written this. ___ SWR mailing list s...@caver.net http://lists.caver.net/cgi-bin/mailman/listinfo/swr ___ This list is provided free as a courtesy of CAVERNET ___ SWR mailing list s...@caver.net http://lists.caver.net/cgi-bin/mailman/listinfo/swr ___ This list is provided free as a courtesy of CAVERNET
Re: [SWR] Pit in Magdalena
If you project the passage, it's the end of Snowy River. On 07/21/2012 9:20, Steve Peerman wrote: News to me. Lots of mining activity around Magdalena. Could be an old mine tunnel that collapsed. On Jul 21, 2012, at 8:33 AM, Lee H. Skinner wrote: Does anyone know about this? http://www.kob.com/article/stories/S2698021.shtml?cat=648 Lee Skinner ___ SWR mailing list s...@caver.net http://lists.caver.net/cgi-bin/mailman/listinfo/swr ___ This list is provided free as a courtesy of CAVERNET
Re: [SWR] Pit in Magdalena
There's so many mines in that area - wonder if that's what it is? Or a hand-dug well - Magdalena is an old town. Will be interesting to hear what NM Tech geologists have to say about it. From: Lee H. Skinner skin...@thuntek.net To: SWR Mailing List s...@caver.net Sent: Saturday, July 21, 2012 8:33 AM Subject: [SWR] Pit in Magdalena Does anyone know about this? http://www.kob.com/article/stories/S2698021.shtml?cat=648 Lee Skinner ___ SWR mailing list s...@caver.net http://lists.caver.net/cgi-bin/mailman/listinfo/swr ___ This list is provided free as a courtesy of CAVERNET___ SWR mailing list s...@caver.net http://lists.caver.net/cgi-bin/mailman/listinfo/swr ___ This list is provided free as a courtesy of CAVERNET
[Texascavers] halogen lamps
Halogen lamps are so more efficient than ordinary incandescent lamps, because they run at a higher temperature and put out more lumens per watt. Sure, every lamp, even an LED, ultimately creates one watt of heat per watt of input, but the question is how much of the energy is useful light on the way to becoming heat. LEDs aren't as much more efficient than other lights as most people think. They seem brighter because their output is inherently focused. They aren't really more efficient than compact fluorescents for area lighting. Halogen bulbs might be an inexpensive substitute for ordinary light bulbs once the clowns in Washington have outlawed the 25-cent kind. -- Mixon --Mixon Forgive your enemies . . . after they are hanged. You may reply to the address this message came from, but for long-term use, save: Personal: bmi...@alumni.uchicago.edu AMCS: edi...@amcs-pubs.org or sa...@amcs-pubs.org - Visit our website: http://texascavers.com To unsubscribe, e-mail: texascavers-unsubscr...@texascavers.com For additional commands, e-mail: texascavers-h...@texascavers.com
Re: [Texascavers] halogen lamps
As a cave manager, I would be more concerned with which type of bulb would reduce (eliminate??) the algal growth on the formations that are near the heat of the lamp. julia -Original Message- From: Mixon Bill bmixon...@austin.rr.com To: Cavers Texas texascavers@texascavers.com Sent: Sat, Jul 21, 2012 11:50 am Subject: [Texascavers] halogen lamps Halogen lamps are so more efficient than ordinary incandescent lamps, because they run at a higher temperature and put out more lumens per watt. Sure, every lamp, even an LED, ultimately creates one watt of heat per watt of input, but the question is how much of the energy is useful light on the way to becoming heat. LEDs aren't as much more efficient than other lights as most people think. They seem brighter because their output is inherently focused. They aren't really more efficient than compact fluorescents for area lighting. Halogen bulbs might be an inexpensive substitute for ordinary light bulbs once the clowns in Washington have outlawed the 25-cent kind. -- Mixon --Mixon Forgive your enemies . . . after they are hanged. You may reply to the address this message came from, but for long-term use, save: Personal: bmi...@alumni.uchicago.edu AMCS: edi...@amcs-pubs.org or sa...@amcs-pubs.org - Visit our website: http://texascavers.com To unsubscribe, e-mail: texascavers-unsubscr...@texascavers.com For additional commands, e-mail: texascavers-h...@texascavers.com
Re: [Texascavers] halogen lamps
Bill you are way behind the times on LED tech. Old school tungsten lamps are 8-20 lumens per watt, as the wattage goes up so does the lumens per watt up to about 35 for projection lamps. Halogen lamps are better then the lower wattage bulbs, at 9-25 lumens per watt. Compact fluorescents typically have 50-70 lumens per watt Regular T5 straight Florescent bulbs run 70-105 lumens per watt Low pressure sodium (yellow street light) have a lumens per watt of ~200, Currently available White LED's from CREE have a lumens per watt of 260 lumens per watt (this is the LED chip used in the Scurion and other of the newer caving lamps) and it is now standard for many LED's available to have lumens per watt in the 100-200 range. When looking at the costs of replacing a whole system of lamps, the bulbs efficiency is often the last thing to worry about, wiring costs, voltage/transformer costs and replacment are bigger factors for the average Joe LED tech is still in a state of rapid development so the bulbs they would buy today may not be avalable nect year, and many of the light manufacturing companys have stopped putting money into CFL development and have instead switched to LED as that is were the future is in lighting (at least on any commercial scale) Terry H. On 7/21/2012 11:50 AM, Mixon Bill wrote: Halogen lamps are so more efficient than ordinary incandescent lamps, because they run at a higher temperature and put out more lumens per watt. Sure, every lamp, even an LED, ultimately creates one watt of heat per watt of input, but the question is how much of the energy is useful light on the way to becoming heat. LEDs aren't as much more efficient than other lights as most people think. They seem brighter because their output is inherently focused. They aren't really more efficient than compact fluorescents for area lighting. Halogen bulbs might be an inexpensive substitute for ordinary light bulbs once the clowns in Washington have outlawed the 25-cent kind. -- Mixon --Mixon Forgive your enemies . . . after they are hanged. You may reply to the address this message came from, but for long-term use, save: Personal: bmi...@alumni.uchicago.edu AMCS: edi...@amcs-pubs.org or sa...@amcs-pubs.org - Visit our website: http://texascavers.com To unsubscribe, e-mail: texascavers-unsubscr...@texascavers.com For additional commands, e-mail: texascavers-h...@texascavers.com - Visit our website: http://texascavers.com To unsubscribe, e-mail: texascavers-unsubscr...@texascavers.com For additional commands, e-mail: texascavers-h...@texascavers.com
[Texascavers] Updated TSA Members List
Hello-I have (separately) emailed the revised TSA members list. If you are a TSA member (dues paid) and did not get it, please email me off list. Thanks, Denise Prendergast TSA Secretary
Re: [Texascavers] Updated TSA Members List
Denise deserves a big THANK YOU from all the members of the TSA for the time and effort she spent putting together this list! THANKS DENISE! Logan On 7/21/2012 5:46 AM, Denise P wrote: Hello-I have (separately) emailed the revised TSA members list. If you are a TSA member (dues paid) and did not get it, please email me off list. Thanks, Denise Prendergast TSA Secretary
Re: [Texascavers] Updated TSA Members List
YOU ROCK, DENISE! Having done something similar for a 25 year old organization was a chore. I can only imagine the fun you had with this project! Thanks so much for taking care of the members. We really appreciate it :) julia -Original Message- From: Logan McNatt lmcn...@austin.rr.com To: Denise P pepabe...@hotmail.com Cc: TexasCavers texascavers@texascavers.com Sent: Sat, Jul 21, 2012 9:22 am Subject: Re: [Texascavers] Updated TSA Members List Denise deserves a big THANK YOU from all the members of the TSA forthe time and effort she spent putting together this list! THANKS DENISE! Logan On 7/21/2012 5:46 AM, Denise P wrote: Hello-I have (separately) emailed the revised TSA members list. If you are a TSA member (dues paid) and did not get it, pleaseemail me off list. Thanks, Denise Prendergast TSA Secretary
Re: [Texascavers] Updated TSA Members List
I agree it is a good job. Thanks Sheryl
Re: [Texascavers] Updated TSA Members List
Awesome, tedious, fantastic job! Thank you Denise. We appreciate it:) Mimi Jasek Sent from my iPhone On Jul 21, 2012, at 5:46 AM, Denise P pepabe...@hotmail.com wrote: Hello-I have (separately) emailed the revised TSA members list. If you are a TSA member (dues paid) and did not get it, please email me off list. Thanks, Denise Prendergast TSA Secretary
Revised TSA Members List
Hello-Attached is the updated list. Enjoy! - Denise Prendergast TSA Secretary TSA Members List 2012-07 REV 1.pdf Description: Adobe PDF document
Re: [Texascavers] HALOGEN lighting system at Longhorn Caverns?
Don, I just called Longhorn Caverns and the person who answered asked one of the tour guides if the new lighting system is halogen or LED. The guide said it is halogen. Same for the description of the new lighting system in the June 21st TPWD press release that can be accessed at the TPWD website or the Longhorn Cavern website (link below). http://www.longhorncaverns.com/pdf/Longhorn_Caverns_New_Lighting.pdf On 7/20/2012 7:06 PM, Don Cooper wrote: Apologies for not staying in closer tune with the details, but the KVUE weather channel news ticker mentioned a new HALOGEN lighting system at Longhorn Caverns... I cannot see how that would POSSIBLY be an energy efficient and less-heat generating lighting option. Please confirm that they are as clueless as they seem - and the new light system is LED based! -WaV - Visit our website: http://texascavers.com To unsubscribe, e-mail: texascavers-unsubscr...@texascavers.com For additional commands, e-mail: texascavers-h...@texascavers.com - Visit our website: http://texascavers.com To unsubscribe, e-mail: texascavers-unsubscr...@texascavers.com For additional commands, e-mail: texascavers-h...@texascavers.com
Re: [Texascavers] HALOGEN lighting system at Longhorn Caverns?
Yeah - I've gone back over it and yes, it is 12V Halogen. In my experience - halogen lighting produces very yellow and very hot bulbs. I don't get it - but apparently, yeah. They are halogen. Not LED, which it would seem would be the most efficient and lowest heat producing light source! -WaV On Sat, Jul 21, 2012 at 9:43 AM, Logan McNatt lmcn...@austin.rr.com wrote: Don, I just called Longhorn Caverns and the person who answered asked one of the tour guides if the new lighting system is halogen or LED. The guide said it is halogen. Same for the description of the new lighting system in the June 21st TPWD press release that can be accessed at the TPWD website or the Longhorn Cavern website (link below). http://www.longhorncaverns.com/pdf/Longhorn_Caverns_New_Lighting.pdf On 7/20/2012 7:06 PM, Don Cooper wrote: Apologies for not staying in closer tune with the details, but the KVUE weather channel news ticker mentioned a new HALOGEN lighting system at Longhorn Caverns... I cannot see how that would POSSIBLY be an energy efficient and less-heat generating lighting option. Please confirm that they are as clueless as they seem - and the new light system is LED based! -WaV - Visit our website: http://texascavers.com To unsubscribe, e-mail: texascavers-unsubscr...@texascavers.com For additional commands, e-mail: texascavers-h...@texascavers.com - Visit our website: http://texascavers.com To unsubscribe, e-mail: texascavers-unsubscr...@texascavers.com For additional commands, e-mail: texascavers-h...@texascavers.com
Re: [Texascavers] HALOGEN lighting system at Longhorn Caverns?
Don, Also the most expensive. We looked at LED when lighting the South Cavern at Natural Bridge. We felt that it's not quite there yet, and at between $60 to $120 per bulb, it simply was not feasible. What we went with is a 12-volt system which does use less power to illuminate the cavern. We are still looking at them as it seems each year the costs keep coming down. Plus there are some incredible systems which would give us interpretive tools which simply haven't existed until now. And going with a full LED system would allow you to run the entire lighting system off of solar panels, thus taking a commercial tour off the grid, so to speak. This is also something we are watching. My experience with halogen is that yes, they burn hot, but if you take the time to design the overall system, your lights are only on when people are actually in a given room or passage and then turned off upon leaving. We also purposefully chose to keep much of the cavern dark. But again, this is a choice made by the installers/owners/operators. We no longer feel it necessary to light up every blessed square inch of cave. If we could go back and relight the North Caverns (and we intend to do so at some point), we would likely remove a significant portion of the ambient light. Doing so is better for the cavern, and we feel it also produces a better experience for the guest. We haven't seen any issues arise with the halogens in the South Cavern. The one drawback with that heat is that calcite will deposit quickly on the lenses of the fixtures. If not maintained, the quality of light from the fixture deteriorates. The fixtures even survived full submersion when part of the cave filled with water back in 2007. I feel that the color of the light gets in to a subjective argument. We feel that halogen actually produces a better color for Natural Bridge over incandescent, and much better than compact fluorescent. To my eye, halogen is more white, thus I feel it produces as neutral a light as possible, if that makes sense. But again, this also goes to what you are attempting to illuminate. The color of the light created by a given bulb can actually enhance a cave scene, depending on the natural colors present within the rock. That's one interesting thing about LED bulbs is that some manufacturers will let us create a bulb with different numbers of blue/white/yellow/red LEDs. Personally, I tend to shy away from doing so as it's not too many steps away from full-on tecno-color-rama of red, blue, purple, and green lights found in some show caves. And that just hurts my feelings, along with my eyes. Brian Vauter Natural Bridge Caverns On Sat, Jul 21, 2012 at 6:33 PM, Don Cooper wavyca...@gmail.com wrote: Yeah - I've gone back over it and yes, it is 12V Halogen. In my experience - halogen lighting produces very yellow and very hot bulbs. I don't get it - but apparently, yeah. They are halogen. Not LED, which it would seem would be the most efficient and lowest heat producing light source! -WaV On Sat, Jul 21, 2012 at 9:43 AM, Logan McNatt lmcn...@austin.rr.com wrote: Don, I just called Longhorn Caverns and the person who answered asked one of the tour guides if the new lighting system is halogen or LED. The guide said it is halogen. Same for the description of the new lighting system in the June 21st TPWD press release that can be accessed at the TPWD website or the Longhorn Cavern website (link below). http://www.longhorncaverns.com/pdf/Longhorn_Caverns_New_Lighting.pdf On 7/20/2012 7:06 PM, Don Cooper wrote: Apologies for not staying in closer tune with the details, but the KVUE weather channel news ticker mentioned a new HALOGEN lighting system at Longhorn Caverns... I cannot see how that would POSSIBLY be an energy efficient and less-heat generating lighting option. Please confirm that they are as clueless as they seem - and the new light system is LED based! -WaV - Visit our website: http://texascavers.com To unsubscribe, e-mail: texascavers-unsubscr...@texascavers.com For additional commands, e-mail: texascavers-h...@texascavers.com - Visit our website: http://texascavers.com To unsubscribe, e-mail: texascavers-unsubscr...@texascavers.com For additional commands, e-mail: texascavers-h...@texascavers.com
[Texascavers] LED efficiency
See http://cool.conservation-us.org/byorg/us-doe/comparing_white_leds.pdf . LEDs are best when used essentially as spotlights, for example as a reading light, task light, or headlight.--Mixon Forgive your enemies . . . after they are hanged. You may reply to the address this message came from, but for long-term use, save: Personal: bmi...@alumni.uchicago.edu AMCS: edi...@amcs-pubs.org or sa...@amcs-pubs.org - Visit our website: http://texascavers.com To unsubscribe, e-mail: texascavers-unsubscr...@texascavers.com For additional commands, e-mail: texascavers-h...@texascavers.com
[SWR] Pit in Magdalena
Does anyone know about this? http://www.kob.com/article/stories/S2698021.shtml?cat=648 Lee Skinner ___ SWR mailing list s...@caver.net http://lists.caver.net/cgi-bin/mailman/listinfo/swr ___ This list is provided free as a courtesy of CAVERNET
Re: [SWR] Pit in Magdalena
News to me. Lots of mining activity around Magdalena. Could be an old mine tunnel that collapsed. On Jul 21, 2012, at 8:33 AM, Lee H. Skinner wrote: Does anyone know about this? http://www.kob.com/article/stories/S2698021.shtml?cat=648 Lee Skinner ___ SWR mailing list s...@caver.net http://lists.caver.net/cgi-bin/mailman/listinfo/swr ___ This list is provided free as a courtesy of CAVERNET Steve Peerman Twenty years from now you will be more disappointed by the things you didn't do than by the ones you did. So throw off the bowlines, Sail away from the safe harbor. Catch the trade winds in your sails. Explore. Dream. Discover. attributed to Mark Twain, but no record exists of his having written this. ___ SWR mailing list s...@caver.net http://lists.caver.net/cgi-bin/mailman/listinfo/swr ___ This list is provided free as a courtesy of CAVERNET
Re: [SWR] Pit in Magdalena
Personally, I think it's just a cover up for a greater conspiracy going on there…….. On the other hand, it could just be a sinkhole or mine tunnel, and worth looking into. Has anyone from the SWR contacted these folks yet? On Jul 21, 2012, at 9:20 AM, Steve Peerman wrote: News to me. Lots of mining activity around Magdalena. Could be an old mine tunnel that collapsed. On Jul 21, 2012, at 8:33 AM, Lee H. Skinner wrote: Does anyone know about this? http://www.kob.com/article/stories/S2698021.shtml?cat=648 Lee Skinner ___ SWR mailing list s...@caver.net http://lists.caver.net/cgi-bin/mailman/listinfo/swr ___ This list is provided free as a courtesy of CAVERNET Steve Peerman Twenty years from now you will be more disappointed by the things you didn't do than by the ones you did. So throw off the bowlines, Sail away from the safe harbor. Catch the trade winds in your sails. Explore. Dream. Discover. attributed to Mark Twain, but no record exists of his having written this. ___ SWR mailing list s...@caver.net http://lists.caver.net/cgi-bin/mailman/listinfo/swr ___ This list is provided free as a courtesy of CAVERNET ___ SWR mailing list s...@caver.net http://lists.caver.net/cgi-bin/mailman/listinfo/swr ___ This list is provided free as a courtesy of CAVERNET
Re: [SWR] Pit in Magdalena
If you project the passage, it's the end of Snowy River. On 07/21/2012 9:20, Steve Peerman wrote: News to me. Lots of mining activity around Magdalena. Could be an old mine tunnel that collapsed. On Jul 21, 2012, at 8:33 AM, Lee H. Skinner wrote: Does anyone know about this? http://www.kob.com/article/stories/S2698021.shtml?cat=648 Lee Skinner ___ SWR mailing list s...@caver.net http://lists.caver.net/cgi-bin/mailman/listinfo/swr ___ This list is provided free as a courtesy of CAVERNET
Re: [SWR] Pit in Magdalena
There's so many mines in that area - wonder if that's what it is? Or a hand-dug well - Magdalena is an old town. Will be interesting to hear what NM Tech geologists have to say about it. From: Lee H. Skinner skin...@thuntek.net To: SWR Mailing List s...@caver.net Sent: Saturday, July 21, 2012 8:33 AM Subject: [SWR] Pit in Magdalena Does anyone know about this? http://www.kob.com/article/stories/S2698021.shtml?cat=648 Lee Skinner ___ SWR mailing list s...@caver.net http://lists.caver.net/cgi-bin/mailman/listinfo/swr ___ This list is provided free as a courtesy of CAVERNET___ SWR mailing list s...@caver.net http://lists.caver.net/cgi-bin/mailman/listinfo/swr ___ This list is provided free as a courtesy of CAVERNET
[Texascavers] halogen lamps
Halogen lamps are so more efficient than ordinary incandescent lamps, because they run at a higher temperature and put out more lumens per watt. Sure, every lamp, even an LED, ultimately creates one watt of heat per watt of input, but the question is how much of the energy is useful light on the way to becoming heat. LEDs aren't as much more efficient than other lights as most people think. They seem brighter because their output is inherently focused. They aren't really more efficient than compact fluorescents for area lighting. Halogen bulbs might be an inexpensive substitute for ordinary light bulbs once the clowns in Washington have outlawed the 25-cent kind. -- Mixon --Mixon Forgive your enemies . . . after they are hanged. You may reply to the address this message came from, but for long-term use, save: Personal: bmi...@alumni.uchicago.edu AMCS: edi...@amcs-pubs.org or sa...@amcs-pubs.org - Visit our website: http://texascavers.com To unsubscribe, e-mail: texascavers-unsubscr...@texascavers.com For additional commands, e-mail: texascavers-h...@texascavers.com
Re: [Texascavers] halogen lamps
As a cave manager, I would be more concerned with which type of bulb would reduce (eliminate??) the algal growth on the formations that are near the heat of the lamp. julia -Original Message- From: Mixon Bill bmixon...@austin.rr.com To: Cavers Texas texascavers@texascavers.com Sent: Sat, Jul 21, 2012 11:50 am Subject: [Texascavers] halogen lamps Halogen lamps are so more efficient than ordinary incandescent lamps, because they run at a higher temperature and put out more lumens per watt. Sure, every lamp, even an LED, ultimately creates one watt of heat per watt of input, but the question is how much of the energy is useful light on the way to becoming heat. LEDs aren't as much more efficient than other lights as most people think. They seem brighter because their output is inherently focused. They aren't really more efficient than compact fluorescents for area lighting. Halogen bulbs might be an inexpensive substitute for ordinary light bulbs once the clowns in Washington have outlawed the 25-cent kind. -- Mixon --Mixon Forgive your enemies . . . after they are hanged. You may reply to the address this message came from, but for long-term use, save: Personal: bmi...@alumni.uchicago.edu AMCS: edi...@amcs-pubs.org or sa...@amcs-pubs.org - Visit our website: http://texascavers.com To unsubscribe, e-mail: texascavers-unsubscr...@texascavers.com For additional commands, e-mail: texascavers-h...@texascavers.com
Re: [Texascavers] halogen lamps
Bill you are way behind the times on LED tech. Old school tungsten lamps are 8-20 lumens per watt, as the wattage goes up so does the lumens per watt up to about 35 for projection lamps. Halogen lamps are better then the lower wattage bulbs, at 9-25 lumens per watt. Compact fluorescents typically have 50-70 lumens per watt Regular T5 straight Florescent bulbs run 70-105 lumens per watt Low pressure sodium (yellow street light) have a lumens per watt of ~200, Currently available White LED's from CREE have a lumens per watt of 260 lumens per watt (this is the LED chip used in the Scurion and other of the newer caving lamps) and it is now standard for many LED's available to have lumens per watt in the 100-200 range. When looking at the costs of replacing a whole system of lamps, the bulbs efficiency is often the last thing to worry about, wiring costs, voltage/transformer costs and replacment are bigger factors for the average Joe LED tech is still in a state of rapid development so the bulbs they would buy today may not be avalable nect year, and many of the light manufacturing companys have stopped putting money into CFL development and have instead switched to LED as that is were the future is in lighting (at least on any commercial scale) Terry H. On 7/21/2012 11:50 AM, Mixon Bill wrote: Halogen lamps are so more efficient than ordinary incandescent lamps, because they run at a higher temperature and put out more lumens per watt. Sure, every lamp, even an LED, ultimately creates one watt of heat per watt of input, but the question is how much of the energy is useful light on the way to becoming heat. LEDs aren't as much more efficient than other lights as most people think. They seem brighter because their output is inherently focused. They aren't really more efficient than compact fluorescents for area lighting. Halogen bulbs might be an inexpensive substitute for ordinary light bulbs once the clowns in Washington have outlawed the 25-cent kind. -- Mixon --Mixon Forgive your enemies . . . after they are hanged. You may reply to the address this message came from, but for long-term use, save: Personal: bmi...@alumni.uchicago.edu AMCS: edi...@amcs-pubs.org or sa...@amcs-pubs.org - Visit our website: http://texascavers.com To unsubscribe, e-mail: texascavers-unsubscr...@texascavers.com For additional commands, e-mail: texascavers-h...@texascavers.com - Visit our website: http://texascavers.com To unsubscribe, e-mail: texascavers-unsubscr...@texascavers.com For additional commands, e-mail: texascavers-h...@texascavers.com
[Texascavers] Updated TSA Members List
Hello-I have (separately) emailed the revised TSA members list. If you are a TSA member (dues paid) and did not get it, please email me off list. Thanks, Denise Prendergast TSA Secretary
Re: [Texascavers] Updated TSA Members List
Denise deserves a big THANK YOU from all the members of the TSA for the time and effort she spent putting together this list! THANKS DENISE! Logan On 7/21/2012 5:46 AM, Denise P wrote: Hello-I have (separately) emailed the revised TSA members list. If you are a TSA member (dues paid) and did not get it, please email me off list. Thanks, Denise Prendergast TSA Secretary
Re: [Texascavers] Updated TSA Members List
YOU ROCK, DENISE! Having done something similar for a 25 year old organization was a chore. I can only imagine the fun you had with this project! Thanks so much for taking care of the members. We really appreciate it :) julia -Original Message- From: Logan McNatt lmcn...@austin.rr.com To: Denise P pepabe...@hotmail.com Cc: TexasCavers texascavers@texascavers.com Sent: Sat, Jul 21, 2012 9:22 am Subject: Re: [Texascavers] Updated TSA Members List Denise deserves a big THANK YOU from all the members of the TSA forthe time and effort she spent putting together this list! THANKS DENISE! Logan On 7/21/2012 5:46 AM, Denise P wrote: Hello-I have (separately) emailed the revised TSA members list. If you are a TSA member (dues paid) and did not get it, pleaseemail me off list. Thanks, Denise Prendergast TSA Secretary
Re: [Texascavers] Updated TSA Members List
I agree it is a good job. Thanks Sheryl
Re: [Texascavers] Updated TSA Members List
Awesome, tedious, fantastic job! Thank you Denise. We appreciate it:) Mimi Jasek Sent from my iPhone On Jul 21, 2012, at 5:46 AM, Denise P pepabe...@hotmail.com wrote: Hello-I have (separately) emailed the revised TSA members list. If you are a TSA member (dues paid) and did not get it, please email me off list. Thanks, Denise Prendergast TSA Secretary
Revised TSA Members List
Hello-Attached is the updated list. Enjoy! - Denise Prendergast TSA Secretary TSA Members List 2012-07 REV 1.pdf Description: Adobe PDF document
Re: [Texascavers] HALOGEN lighting system at Longhorn Caverns?
Don, I just called Longhorn Caverns and the person who answered asked one of the tour guides if the new lighting system is halogen or LED. The guide said it is halogen. Same for the description of the new lighting system in the June 21st TPWD press release that can be accessed at the TPWD website or the Longhorn Cavern website (link below). http://www.longhorncaverns.com/pdf/Longhorn_Caverns_New_Lighting.pdf On 7/20/2012 7:06 PM, Don Cooper wrote: Apologies for not staying in closer tune with the details, but the KVUE weather channel news ticker mentioned a new HALOGEN lighting system at Longhorn Caverns... I cannot see how that would POSSIBLY be an energy efficient and less-heat generating lighting option. Please confirm that they are as clueless as they seem - and the new light system is LED based! -WaV - Visit our website: http://texascavers.com To unsubscribe, e-mail: texascavers-unsubscr...@texascavers.com For additional commands, e-mail: texascavers-h...@texascavers.com - Visit our website: http://texascavers.com To unsubscribe, e-mail: texascavers-unsubscr...@texascavers.com For additional commands, e-mail: texascavers-h...@texascavers.com
Re: [Texascavers] HALOGEN lighting system at Longhorn Caverns?
Yeah - I've gone back over it and yes, it is 12V Halogen. In my experience - halogen lighting produces very yellow and very hot bulbs. I don't get it - but apparently, yeah. They are halogen. Not LED, which it would seem would be the most efficient and lowest heat producing light source! -WaV On Sat, Jul 21, 2012 at 9:43 AM, Logan McNatt lmcn...@austin.rr.com wrote: Don, I just called Longhorn Caverns and the person who answered asked one of the tour guides if the new lighting system is halogen or LED. The guide said it is halogen. Same for the description of the new lighting system in the June 21st TPWD press release that can be accessed at the TPWD website or the Longhorn Cavern website (link below). http://www.longhorncaverns.com/pdf/Longhorn_Caverns_New_Lighting.pdf On 7/20/2012 7:06 PM, Don Cooper wrote: Apologies for not staying in closer tune with the details, but the KVUE weather channel news ticker mentioned a new HALOGEN lighting system at Longhorn Caverns... I cannot see how that would POSSIBLY be an energy efficient and less-heat generating lighting option. Please confirm that they are as clueless as they seem - and the new light system is LED based! -WaV - Visit our website: http://texascavers.com To unsubscribe, e-mail: texascavers-unsubscr...@texascavers.com For additional commands, e-mail: texascavers-h...@texascavers.com - Visit our website: http://texascavers.com To unsubscribe, e-mail: texascavers-unsubscr...@texascavers.com For additional commands, e-mail: texascavers-h...@texascavers.com
Re: [Texascavers] HALOGEN lighting system at Longhorn Caverns?
Don, Also the most expensive. We looked at LED when lighting the South Cavern at Natural Bridge. We felt that it's not quite there yet, and at between $60 to $120 per bulb, it simply was not feasible. What we went with is a 12-volt system which does use less power to illuminate the cavern. We are still looking at them as it seems each year the costs keep coming down. Plus there are some incredible systems which would give us interpretive tools which simply haven't existed until now. And going with a full LED system would allow you to run the entire lighting system off of solar panels, thus taking a commercial tour off the grid, so to speak. This is also something we are watching. My experience with halogen is that yes, they burn hot, but if you take the time to design the overall system, your lights are only on when people are actually in a given room or passage and then turned off upon leaving. We also purposefully chose to keep much of the cavern dark. But again, this is a choice made by the installers/owners/operators. We no longer feel it necessary to light up every blessed square inch of cave. If we could go back and relight the North Caverns (and we intend to do so at some point), we would likely remove a significant portion of the ambient light. Doing so is better for the cavern, and we feel it also produces a better experience for the guest. We haven't seen any issues arise with the halogens in the South Cavern. The one drawback with that heat is that calcite will deposit quickly on the lenses of the fixtures. If not maintained, the quality of light from the fixture deteriorates. The fixtures even survived full submersion when part of the cave filled with water back in 2007. I feel that the color of the light gets in to a subjective argument. We feel that halogen actually produces a better color for Natural Bridge over incandescent, and much better than compact fluorescent. To my eye, halogen is more white, thus I feel it produces as neutral a light as possible, if that makes sense. But again, this also goes to what you are attempting to illuminate. The color of the light created by a given bulb can actually enhance a cave scene, depending on the natural colors present within the rock. That's one interesting thing about LED bulbs is that some manufacturers will let us create a bulb with different numbers of blue/white/yellow/red LEDs. Personally, I tend to shy away from doing so as it's not too many steps away from full-on tecno-color-rama of red, blue, purple, and green lights found in some show caves. And that just hurts my feelings, along with my eyes. Brian Vauter Natural Bridge Caverns On Sat, Jul 21, 2012 at 6:33 PM, Don Cooper wavyca...@gmail.com wrote: Yeah - I've gone back over it and yes, it is 12V Halogen. In my experience - halogen lighting produces very yellow and very hot bulbs. I don't get it - but apparently, yeah. They are halogen. Not LED, which it would seem would be the most efficient and lowest heat producing light source! -WaV On Sat, Jul 21, 2012 at 9:43 AM, Logan McNatt lmcn...@austin.rr.com wrote: Don, I just called Longhorn Caverns and the person who answered asked one of the tour guides if the new lighting system is halogen or LED. The guide said it is halogen. Same for the description of the new lighting system in the June 21st TPWD press release that can be accessed at the TPWD website or the Longhorn Cavern website (link below). http://www.longhorncaverns.com/pdf/Longhorn_Caverns_New_Lighting.pdf On 7/20/2012 7:06 PM, Don Cooper wrote: Apologies for not staying in closer tune with the details, but the KVUE weather channel news ticker mentioned a new HALOGEN lighting system at Longhorn Caverns... I cannot see how that would POSSIBLY be an energy efficient and less-heat generating lighting option. Please confirm that they are as clueless as they seem - and the new light system is LED based! -WaV - Visit our website: http://texascavers.com To unsubscribe, e-mail: texascavers-unsubscr...@texascavers.com For additional commands, e-mail: texascavers-h...@texascavers.com - Visit our website: http://texascavers.com To unsubscribe, e-mail: texascavers-unsubscr...@texascavers.com For additional commands, e-mail: texascavers-h...@texascavers.com
[Texascavers] LED efficiency
See http://cool.conservation-us.org/byorg/us-doe/comparing_white_leds.pdf . LEDs are best when used essentially as spotlights, for example as a reading light, task light, or headlight.--Mixon Forgive your enemies . . . after they are hanged. You may reply to the address this message came from, but for long-term use, save: Personal: bmi...@alumni.uchicago.edu AMCS: edi...@amcs-pubs.org or sa...@amcs-pubs.org - Visit our website: http://texascavers.com To unsubscribe, e-mail: texascavers-unsubscr...@texascavers.com For additional commands, e-mail: texascavers-h...@texascavers.com
