Fraction radiant information for t12 t8 and LED

asked 2019-02-07 23:59:49 -0500

baum
85 ●4

I am working on a building model in openstudio and having a horrible time finding any real information for radiant heat for light definitions. Would anyone know of a source to find this information, i have looked at other questions similar but those did not really answer the question? I am looking at T12 in the building and wanting to model retrofit to T8 and LED replacements.

Thank you, Steven

answered 2019-02-08 11:37:09 -0500

mdahlhausen

9314 ●17 ●11 http://openstudio.net/

updated 2019-02-09 16:05:45 -0500

Heat gain distributions for LED lighting are given in ASHRAE RP-1681 "Low Energy LED Lighting Heat Distribution in Buildings", summarized in this paper (paywall), and heat gain for fluorescent luminaires and other types are in ASHRAE RP-1282 "Lighting Heat Gain Distribution in Buildings". If you are an ASHRAE member, you can access these research reports for free online through the ASHRAE technology portal.

Some heat gain fractions for fluorescent and incandescent luminaires are list in the EnergyPlus Input Output Reference.