Plug-N-Play 4ft 18 Watt T8 LED Tube DLC & UL approval Cool White (5000K) Frosted Lens, Ballast Compatible Direct Fit tube Can work with or without a ballast, Aluminum alloy back Matches more than 95% of most common electronic ballasts used in North America Long lifespan of 5 years, 50,000hrs No UV, No RF Interference, Mercury Free