What does "L70 B10" mean about led light?
L70 refers to lumen depreciation to 70% of initial lumen output; stated conversely, it indicates 70% lumen
maintenance. “B” specs add a target statistical confidence interval. Thus, B50 indicates no more than 50%
of a sample of LED devices would be expected to have their light output drop below a target lumen
maintenance level. B10 would mean no more than 10% of the sample met that L standard within the given time.
