Convert your existing fluorescent fixture to LED technology with the Feit Electric T48/850/LEDG2 4ft. T8/T12 LED plug and play lamps. This 5000 K daylight light and is non-dimmable. It produces a similar fluorescent lamp output (1800 Lumens), uses 14 W of electricity and up to 65% less energy than a standard fluorescent lamp. Get instant on to full brightness even in sub-zero temperatures with relatively cool running performance. Feit Electric shatter-proof T8/T12 lamps have an average life of 50,000 hrs / 45.7 years are RoHS compliant and are 100% mercury-free. Choose a dependable flicker-free bulb for residential or commercial applications. No replacement of the ballast or installation of LED driver or removal of old ballast required.