Description FINALLY An Affordable LED With Equal Light Output To A 40 Watt Florescent Light! This case of 20 LED lights replaces ALL fluorescent 4 foot tube lights with G13 double pin ends after rewiring your fixtures. Fits Into T8, T10 and T12, Just Rewire Your Current Fluorescent Sockets By: Disconnecting the ballast. Connecting input power of 110-277 volts AC to one lamp holder socket. Now move to the other end of the fixture and connect the last fluorescent lamp holder socket to neutral. The LED's are configured for the highest efficiency so they are not dimmable and the cover over the LED's is frosted for reduced glare. Each 4 foot long tube uses about 18 watts of power and produces about 1600LM. The blue color provides a daylight white output with a 6000K color temperature.