RE: CCFL light output
I think I understand what he is asking - He has a chart of (CCFL) tubes with specified length and diameter and Lumens output for that specific tube length and diameter. What he wants is the relationship between the light output in Lumens and the necessary input power in Watts. I would go back to the manufacturer for that information. John Shinn, P.E. -Original Message- From: owner-emc-p...@majordomo.ieee.org [mailto:owner-emc-p...@majordomo.ieee.org]On Behalf Of John Woodgate Sent: Wednesday, February 27, 2002 11:07 PM To: emc-p...@majordomo.ieee.org Subject: Re: CCFL light output I read in !emc-pstc that Wani, Vijay (V) wrote (in ) about 'CCFL light output', on Wed, 27 Feb 2002: > I am trying to build a thermal model a cold cathode fluorescent lamp (CCFL) >for cooling analysis. CCFL manufacturer showing a chart of light output in >Lumens as a function of lamp length and diameter. I need to convert lumens >to watts for input into Icepak. I would appreciate any help you can provide. Your question may have been misunderstood. Are you looking for the thermal power produced by absorption of the light by surrounding components? Or the power input to the lamp required to produce a light output of a given number of lumens? -- Regards, John Woodgate, OOO - Own Opinions Only. http://www.jmwa.demon.co.uk Interested in professional sound reinforcement and distribution? Then go to http://www.isce.org.uk PLEASE do NOT copy news posts to me by E-MAIL! --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list" --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
Re: CCFL light output
I read in !emc-pstc that Wani, Vijay (V) wrote (in ) about 'CCFL light output', on Wed, 27 Feb 2002: > I am trying to build a thermal model a cold cathode fluorescent lamp (CCFL) >for cooling analysis. CCFL manufacturer showing a chart of light output in >Lumens as a function of lamp length and diameter. I need to convert lumens >to watts for input into Icepak. I would appreciate any help you can provide. Your question may have been misunderstood. Are you looking for the thermal power produced by absorption of the light by surrounding components? Or t
Re: CCFL light output
Recommend you get a copy of Westinghouse Lighting Handbook In one table they show lumens output for various fluorescent lamps with current and volts input required. for the Preheated des.len curr. vol. *pwr lumens *lumens/watt 4W 6 0.132 32 4.32 115 26.6 6W 9 0.147 47 6.91 250 36.2 8W 12 0.170 56 9.56 420 43.9 20W 24 0.380 56 21.321220 57.2 30W 36 0.355 98 34.8 2100 60.3 84W 60 1.530 63 96.4 6250 64.8 for the High Output len*pwr lumens *lumens/watt 24 32.8160048.8 48 60 400053.5 72 90.4645071.3 961328 900068.2 for the Super-Hi, Outdoor, and Low temp-jacketed len*pwr lumens *lumens/watt 48 129 6900 53.5 72 19211100 62.5 96 25815500 60.1 *calculated values Appears to be a nonlinear relationship. Also, Slimline which come in smaller/different diameters have different lumens per watt for the same length. There is another curve rating efficiency (lumens per watt) which ranges from 52 lumens per watt for a natural color lamp to 80 lumens per watt for warm white lamps. But it doesn't say which basic tube is used as a reference. Probably 72inch Is this enough for you to do your modeling? - Robert - Robert A. Macy, PEm...@california.com 408 286 3985 fx 408 297 9121 AJM International Electronics Consultants 619 North First St, San Jose, CA 95112 -Original Message- From: Wani, Vijay (V) To: 'emc-p...@majordomo.ieee.org' List-Post: emc-pstc@listserv.ieee.org Date: Wednesday, February 27, 2002 8:27 AM Subject: CCFL light output > >Group: > I am trying to build a thermal model a cold cathode fluorescent lamp (CCFL) >for cooling analysis. CCFL manufacturer showing a chart of light output in >Lumens as a function of lamp length and diameter. I need to convert lumens >to watts for input into Icepak. I would appreciate any help you can provide. > >thank you in advance. > >Vijay Wani > --- This message is from the IEEE EMC Society Product Safety Technical Committee emc-pstc discussion list. Visit our web site at: http://www.ewh.ieee.org/soc/emcs/pstc/ To cancel your subscription, send mail to: majord...@ieee.org with the single line: unsubscribe emc-pstc For help, send mail to the list administrators: Ron Pickard: emc-p...@hypercom.com Dave Heald: davehe...@mediaone.net For policy questions, send mail to: Richard Nute: ri...@ieee.org Jim Bacher: j.bac...@ieee.org All emc-pstc postings are archived and searchable on the web at: http://ieeepstc.mindcruiser.com/ Click on "browse" and then "emc-pstc mailing list"
