T8 solid state LED (light emitting diode) tube light bulb with medium bi-pin base. Fluorescent tube replacement. For use in Instant Start and Rapid Start ballasts with no rewiring required - may not be compatible with all Rapid Start and emergency ballasts. Features include high efficacy, long life, all glass tube, 210-degree beam spread, and DLC (DesignLights Consortium) certified. Ballast required, non-dimmable. 82 CRI (color rendering index). cULus damp location rated. Operating temperature: -20 degrees Celsius (-4 degrees Fahrenheit) to 45 degrees Celsius (113 degrees Fahrenheit). 5-year limited warranty. Lawful for sale in California.