... hours under normal use, especially for office lighting.* Optimized light extraction system delivery high lumens.* No RF interference, Lead ... of LEDs, no trouble of replace parts of narmal fluorescent tube.* No flash, AC driving, stable light, protect eyes.* Good ... RF interference. *Application:1. Instead of the indoors ceiling light 2. Factories, Offices,School,Universities,Hosptial 3. Conference, ...