T8 solid-state LED (light emitting diode) tube light bulb with medium bi-pin base and ColorQuick technology. Direct replacement for linear fluorescent T8 lamps in existing fixtures with instant or rapid start ballasts (check ballast compatibility). No rewiring required. Adjustable color temperature of 4000K Cool White, 5000K Bright White or 6500K Day Light using switch on end of the tube. Features include high efficacy, 50,000-hour long life, all glass tube, and 220-degree beam spread. 90 CRI (color rendering index). Operating temperature: -20 degrees Celsius (-4 degrees Fahrenheit) to 45 degrees Celsius (113 degrees Fahrenheit). cULus damp location rated. Box includes (2) tube light bulbs. 5-year limited warranty. Lawful for sale in California.