Sunlite 87908-SU LED T8 U-Bend Tube, Single End Bypass, 18 Watts, 50,000 Hour Lifespan, 2200 Lumens, Shatter Resistant, DLC Listed, 1 Pack, 40K - Cool WhiteSize:1 Pack | Color:40K - Cool White Upgrade your T8 fluorescent U-Bend lamps with energy efficient LED single end bypass bulbs. These tubes are instant on at full brightness with no buzzing or flickering. With a life span of up to 50,000 hours you'll be required to replace difficult to reach bulbs less often. You'll save maintenance costs and save energy at the same time. Ideal for ceiling fixtures, troffers, offices, or any fluorescent U-Bend fixtures in commercial locations. These fluorescent replacement LED bulbs do not require a ballast. You must bypass the ballast in all fixtures before installing these bulbs. Simple instructions available online or consult an electrician for more information.