Philips Ballast Bypass T8 LED (light emitting diode) tube with bi-pin base. Features its own integrated ballast. Rewiring of existing fixture is necessary, always follow manufacturer's instructions. 2 live end feed, must use non-shunted sockets. Rated from -20 Deg (degrees) F (Fahrenheit) to 45 Deg F. Provides exceptional LED lighting with reduced energy and maintenance cost. Lamp does not require a ballast to work and offers a built-in driver in the lamp. UL (Underwriter's Laboratories) Type B-Ballast Bypass. ETL approved.