LM-79 and LM-80 IESNA Standards
LM-79 and LM-80 are two standards drafted by the Illuminating Engineering Society of North America (IESNA) to measure LED performance.
LM-79
LM-79
specifies procedures for measuring electrical and photometric data such
as
Total lumen flux
Electrical power
Efficacy
and other factors.
LM-80
LM-80 specifies procedures for determining lumen depreciation of LEDs related to the life of the product.