New standards will enable lumen maintenance projections for SSL

LED-based solid-state lighting (SSL), inherently featuring long useful lifetimes, has created an issue for the lighting industry. The industry needs a way to project the useful lifetime and specifically the system-level lumen maintenance of lamps and luminaires. Standards bodies are progressing on an approach that will combine LM-84 testing data on lamps and luminaires, with a new TM-28 standard that standardizes methods on projecting the measured data over longer lifetimes. The approach parallels the way the LM-80 and TM-21 are used to project LED component lumen maintenance.