"Upgrade your old fluorescent fixtures to energy-saving LED technology with the Feit Electric 8-inch diameter LED circular lamp with a 4-pin base. This fluorescent replacement produces 1400 lumens of 4100K Cool White light using only 15 watts - saving up to 32% in energy costs over an equivalent 22-watt fluorescent. Our LED Circline Fluorescent Replacement series offers relatively cool running performance with an average rated service life of 25,000 hours / 22.8 years. Installation is easy: no replacement of ballast or rewiring of fixture is needed. Choose a dependable LED fluorescent replacement bulb for all your residential or commercial applications."