The Westgate Mfg T8-4FT-TYPB-17W-50K-F is a 17W 4-foot Type B LED T8 tube lamp with a frosted glass finish for diffused output in direct-wire fluorescent retrofit installations. Outputting 2,200 lumens at 5000K across a 180 beam angle, it accommodates single- or double-ended wiring. UL listed with a 50,000-hour rated life, CRI >80, and a 5-year warranty.