On 11/08/2014 03:45 PM, Greg Bernard wrote:
> Not following your description, Jon. Do you have a pic of what you did with
> the PC board?
>
I really ought to do this, but haven't made pictures so
far. I take a 22" long,
2" wide piece of double sided PC board material. The
dimensions are
partly
The only thing that makes changing technologies (or bulbs) economic is
if there is a real gain. If you are hitting a burned out bulb, and
you WANT to change, AND you don't have any more of the old bulbs in
the cupboard, then changing tech seems reasonable. Just because CFL
is more efficient, but
Going even more off topic - these aren't particularly useful shop
lights, but they are blindingly bright and incredibly cheap.
100 Watts, 9000 lumens.
They need heat sinking (I've used CPU fan/sink combos).
http://www.ebay.com/itm/380515680644
On Sat, Nov 8, 2014, at 05:06 PM, Tom Easterday w
Since this thread is heading down the path of DIY, and since I just ordered
some more of these for a lamp I am upgrading, I thought I would mention this
very useful LED module from Seoul Semiconductor which is powered directly off
120/220V mains. All that is required is a heat sink to mount it
omist."
-Kenneth Boulding, economist
“How unfortunate that the Earth’s first intelligent social animal is a tribal
carnivore”
-E.O. Wilson, sociobiologist
From: Jon Elson
To: Enhanced Machine Controller (EMC)
Sent: Saturday, November 8, 2014 3:33 PM
Subject: Re: [Emc-users] Off T
On 11/08/2014 11:29 AM, Dave Cole wrote:
>>> I wonder how long it takes to pay back the $75
> difference at 9 watts?
>
> 9 watts x 2000 hrs per year = 18KWHR/yr @ $0.10 per KWHR that would
> be $1.80 per year so a payback of $75/$1.8 = $41.6 years
>
>
I made up my own LED retrofits, because I
>>I wonder how long it takes to pay back the $75
difference at 9 watts?
9 watts x 2000 hrs per year = 18KWHR/yr @ $0.10 per KWHR that would
be $1.80 per year so a payback of $75/$1.8 = $41.6 years
So payback will occur during my next life. ;-)
This the same reason why buying 50 year life s
I find it hard to beat T8 fluorescent bulbs at $2.50 each by the 10 pack
with brighter color of 6500K and the same lumens of 2300... the only
savings is 9 watts. I wonder how long it takes to pay back the $75
difference at 9 watts?
JT
On 11/8/2014 6:30 AM, Ron Ginger wrote:
> On 11/8/2014 12:0
On 11/8/2014 12:05 AM, emc-users-requ...@lists.sourceforge.net wrote:
> On 7 November 2014 23:10, Kirk Wallace wrote:
>> >This looks interesting, but I have no idea how well these dimmable T8
>> >LEDs work.
>> >http://www.ebay.com/itm/121227773225
I just bought 2 of these to try. I like the light
On 7 November 2014 23:10, Kirk Wallace wrote:
> This looks interesting, but I have no idea how well these dimmable T8
> LEDs work.
> http://www.ebay.com/itm/121227773225
These make good machine lights:
http://www.ikea.com/gb/en/catalog/products/00169635/
(they come with a 4V supply but don't mind
This looks interesting, but I have no idea how well these dimmable T8
LEDs work.
http://www.ebay.com/itm/121227773225
another option is to use a bunch of E26 screw base bulbs which are
getting fairly cheap these days.
--
Kirk Wallace
http://www.wallacecompany.com/machine_shop/
http://www.walla
They work pretty good but you have to watch out for the power supplies. I
make light fixture housings for a company that uses those LED "fluorescent"
bulbs. They have had quite a few fail because of bad caps in the power
supplies. Other than that they are great.
On Fri, Nov 7, 2014 at 6:10 PM,
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