Tri-Proof Fixture (Shell – TW TL TS Series), are heavy-duty light fixtures mainly for outdoor usage under tough weather conditions. The models are tri-proof fixture without metal plate, which are cost saving economical model for LED tubes. They can be used with either single end or double end connection LED tubes powered by internal driver, which the fixture can hold single tube or double tubes. Tri-proof stands for water proof, dust proof and corrosion proof, which means that the fixture could well protect light source from these wearing causes. Tri-proof LED Fixture use full plastic as body material which could be with HIPS / ABS / PC. They use transparent cover made of PC / PS. The cover and base are locked by either plastic or stainless-steel clips. There are also stainless-steel base model using tempered glass cover. Tri-proof fixture cand be made in length 0.6m, 0.9m, 1.2m and 1.5m. Tri-proof fixture use screw mounting metallic clamps to install, which they could be use both indoor or outdoor in damp underground pedestrian walkway, harbor walls or ceilings, as well as outdoor building or construction site. Waterproof linear fixture is particular safe and reliable, and well certified by TUV and SGS with CE, RoHS, ERP and CB.