LED Lifetime and Failure Rate
| Date | August 07, 2017 |
| Categories |
The light output of an LED module decreases over the lifetime, this is characterized by the L value.
L70 = 70% of its initial luminous flux; L90 = 90% of its initial luminous flux;
The B value defines the amount of modules which are below the specific L value.
L70 B10 = 10% of modules are below 70% of their initial luminous flux L90 B10 = 10% of modules are below 90% of their initial luminous flux
The C value defines the percentage of fatally failed modules.
F value = B + C
L70 F10 = 10% of modules may fail or be below 70% of their initial luminous flux L90 F10 = 10% of modules may fail or be below 90% of their initial luminous flux
