What does it provide?
The method will provide a projected lifetime for the LED source or system.
Life notation results will then use the following standardized nomenclature: Lp (Yk)
– P: Lumen maintenance percentage. For LED luminaire we consider L70 to be the standard. After 30% lumen depreciation, we consider the system is not performing its duty anymore and should be replaced (see Lifetime section of Lighting Guide for more details)
– Y: Length of LM-80 data period in thousands of hours
Example: L70(6k) = 36,000 hours