3Ft. LED T8 Tube Light from Keystone. The 12Watt, 4000K F32T8 Fluorescent Replacement LED drastically reduces electricity costs while providing an efficient, durable T8 Lamp. It bypasses traditional ballasts and connects either Single-Ended or Double-Ended Line Voltage. The KT-LED12T8-36GC-840-DX2 T8 Lamp is ideal for a variety of applications, from Residential to Commercial applications like: office lighting, classroom lighting, overhead lighting and more. Equipped with a 5 Year Warranty and 50,000 Hour Rated Lifespan. UL, RoHS, cRUs and DLC Certified.