Specification:1>Housing and diffuser are made of self-extinguishing polycarbonate,totally enclosed impact proof,fire proof,fire proof,high temperature proof,and against UV radiation. 2>It has IP range of IP 65. Luminaries with smooth outer surface and prismatic inner surface will keep internally cleaner and brighter. 3>It's installed with 18W&35W by one or two T8 fluorescent tubes. 4>It is ideally suited to both home and commercial environments.I.e.intersection bridge,factory,medicine factory,foodstuff factory,kitchens,sauna room,corridor,tunner,parking lot,waiting hall and other public places.