... system3. LonENife time more than 50,000 hours under normal use, especially for office lighting.4. Optimized light extraction system ... 1.Shell is made of Alloy,high quality, be good at heat dissipation.2.Good color vision, color temperature can ... 300mm,450mm,600mm,900mm,1200mm,1500mm,1800mm,2400mm etc.LED Tube Application : Widespread use in family ,SchoolOffice,Showing Room ,Meeting RoomCommercial ...