These Frosted 4 ft. 22-Watt T8 Tube Bulbs are great for replacing old fluorescent lights. They can work with single or double-ended wiring schemes. Easy Installation with 8 ways to wire/rewire. Ideal for use in warehouses, hotels, schools and restaurants. The Viribright 4 ft.22-Watt T8 (ft.) Ballast Bypass LED is the high-powered choice for installation in retrofit fixtures requiring 4 ft. linear fluorescent tubes. These tubes will commonly be found in workshops, offices, grocery stores and convention halls but their brightness is on the higher side of their category. This tube must be used without a ballast (direct wire) which reduces the overall energy consumption of the fixture. The total energy consumption of this tube is 22-Watt while producing in excess of 2900 lumens in 5000K and 6000K color temperatures. These tubes are easy to install, but it is recommended to have a certified electrician handle the bypassing of the ballast and installation.