Philips LED InstantFit 4-Foot T8 Tube Light Bulb 2100-Lumen, 5000-Kelvin, 17-Watt (32-Watt Equivalent), Medium Bi-Pin G13 Base, Daylight (5000K), 10-Pack Plug and play Philips LED T8 tube lights with InstantFit are the fast, easy way to replace your old fluorescent tubes with modern, efficient LED light. No rewiring neededuse these 1-inch diameter bulbs in medium bi-pin (G13) base T8 fixtures. High-output Philips LED tube lights turn on instantly at full brightness with the flip of a switchno slow starting, flickering, or waiting. These bulbs offer exceptional clarity and color rendering for task lighting boasting a high CRI of 82. With up to 36,000 hours of expected life under normal conditions, these exceptionally long-lasting bulbs reduce the hassle of frequent bulb replacementespecially in high and/or hard to reach areas. Better for you, better for the environment, Philips LED tube lights save on energy and are mercury-free so they don't contribute to harmful hazardous waste. This is a 4-foot (48-inch) Philips LED tube (T8) 17-watt (32-watt equivalent) light bulb. This bulb emits 2100 lumens of cool bright, full-spectrum light at 5000-kelvin.