Goodlite G-83403 18W 48" T12 & T8 Fluorescent Replacement.Universal Direct OR Bypass T8 LED Light Bulb. One side power or  two side power, Cool White 4100k, Goodlite, LED Universal T8 bulbs saving energy up to 65% With a 5 year warranty DLC Listed, 120/277 Volts Installs easily in seconds. No wiring necessary, Low Lumen Depreciation - Environmentally friendly Uniformed and consistent color - Excellent thermo control - High efficient driver inside -Highly uniform light beams- Wide beam desighn 320 degree Easy installation with Universal LED T8, Replace your T12/T8 flouresecnt tubes, with led's Use same Fixture just Plug in with your existing T8 ballast or bypass the ballest, See wiring diagram Saved $ for 18W = $126.31. in energy savings over the life of the bulb based on 3 hours per day usage (based on $0.115/kwh)