Lumen maintenance is not the whole story
•LM-80-08 and TM-21-11 provide an industry standard for lumen
maintenance testing and for lumen maintenance extrapolations for LED
components. LM-79 is the lumen maintenance standard for SSL systems.
•Next Generation Industry Alliance and US Department of Energy ‘LED
Luminaire Lifetime: Recommendations for Testing and Reporting, 2nd
edition’, June 2011, discusses practical lifetime considerations for SSL
luminaires.
•Lumen maintenance is not the dominant failure mode for most SSL
produc