Convert your existing fluorescent fixture to LED technology with the Feit electric T848/840/LEDG2/2 4 ft T8 LED plug-and-play two-pack lamps. These 4100K cool white, non-dimmable tubes produce a similar fluorescent lamp output (1800 Lumens), uses 18 W of electricity and 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 shatterproof T8 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.