The Westgate Mfg T8-4FT-DIM-18W-40K-F is a 4 ft. 18W T8 LED glass tube lamp designed for direct-wire ballast-bypass retrofits in commercial, office, and light industrial fluorescent fixtures. Delivering 2,150 lumens at 4000K with a 120 beam angle, it wires single-ended (one end N+L) and supports dimmable direct A/C operation on 90140V AC. UL listed with a 50,000-hour rated life and a 5-year warranty. Frosted lens, glass tube construction for reduced glare.