Convert your existing fluorescent fixture to LED technology with the Feit Electric T848/850/B/LED/2 ballast bypass LED linear lamps. These 4 ft T8 tubes produce 1800 Lumens of 5000 K daylight color temperature light using only 18 W - up to 44% less energy than a fluorescent lamp. Each shatter-proof T8 lamp has an average life of 35,000 hr/32 years, is RoHS compliant and 100% mercury-free. Choose a dependable flicker-free bulb for residential or commercial applications.