Convert your existing fluorescent fixture to LED technology with the Feit Electric T848/850/LEDG2/2 4 ft T8/T12 LED plug-and-play two-pack lamps. These 5000 K natural daylight non-dimmable tubes produce a similar fluorescent lamp output (1800 Lumens), using only 18 W of electricity - up to 44% 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 35,000 hr/32.0 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.