The Westinghouse T8 Universal Ballast Bypass Dimmable Linear LED light bulb (5000K) can be installed anywhere you would use a 4 ft. T8 or T12 fluorescent bulb. Operates with direct line voltage, no ballast is required, and no need to change existing tombstone sockets. Knowledge of fluorescent lighting fixtures and electrical systems is required for ballast bypass wiring. This linear LED tube light bulb also replaces single-ended and double-ended TLEDs with no additional wire change. In a single-end power configuration, the bulb must be used with non-shunted tombstones. In a double-end power configuration, the bulb can be used with either shunted or non-shunted tombstones. Turns on without flickering, provides brightness and color quality comparable to fluorescent bulbs, and lasts up to 2.5 times longer. It reduces energy costs up to 47% compared to linear fluorescents. Provides optimized general illumination and excellent light distribution. Light is focused downwards where needed. This universal ballast bypass TLED is designed with a built-in safety feature to cut off power flow to exposed end, and eliminate risk of shock if exposed pins are touched once the bulb is installed in a socket. Westinghouse is a trusted, global brand. Westinghouse knows lighting and offers products with exceptional quality, reliability and functionality. Product reference number 51441.