Upgrade fluorescent fixtures to LED technology with Feit Electric T4819/LEDIF/41K 4ft. LED lamps. This LED Ballast bypass tube eliminates the need for ballasts. Installation requires basic re-wiring of the fixture but provides greater efficiency and eliminates replacements due to ballast failure. It replaces T8 and T12 fluorescent tubes with long-lasting, energy-saving LED. 4100K Cool White light is ideal for task lighting and workspaces. This non-dimmable tube produces a similar light output (2090 lumens) to 40-watt fluorescents using only 18.5 watts of electricity. Get instant on to full brightness with relatively cool running performance. Feit Electric tubes are shatterproof and 100% mercury free, providing a safer working environment and easier disposal. They have an average life of 50,000 hours/45.7 years and are RoHS compliant. Choose a dependable Feit Electric LED linear tube for residential or commercial applications.