... under narmal use, especially for office lighting.3. Optimized light extraction system delivery high lumens.4. No flash, AC driving, stable ... to 7500K6. Not easy broken, all materials from inner light sources to outer cases are hard materials, such as PC ... ;2. School, university, hospital, hotel;3. Conference, meeting room, show room, showcase;4. Commercial complexes;5. Factory, plant, warehouse, office ...