... >85% 3.OEM 4.CE and RoHs approval LED ceiling light 9W Watt9WOperating VoltageAC85-265VOperational Environment-20°C~+60°C MaterialAluminum ... hours under normal using, especially for office lighting.4. Optimized light extraction system delivery high lumens.5. No RF interference, ... materials listed in RoHS.8. No flash, AC driving, stable light, protect eyes.9. Good color vision, color temperature can ...