Convert your existing fluorescent fixture to LED technology with the Feit Electric T24/840/LEDG2 2ft. T8/T12 LED lamps. This 4100K cool white lamp is non-dimmable and produces a similar fluorescent lamp output of 850 Lumens, uses 8 W of electricity and up to 60% 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 fluorescent T8/T12 lamps have an average life of 50,000 hours 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.