A vehicle LED tail-light bulb (10) that is designed to replace an incandescent light bulb, to be inserted into a conventional right and left vehicle light socket and to function in combination with a vehicle battery that powers the bulb (10) and a flasher unit that is activated by a vehicle turn-signal arm. The LED tail-light bulb incorporates an electronics circuit consisting of an input circuit (12), an intermediate circuit (14) and an output circuit (16). The electronics circuit is designed to operate the left and right turn lights and in some cases an emergency light and to produce a current flow of sufficient magnitude to energize the vehicle flasher unit. The energized flasher unit then causes the bulb (10) to blink when the vehicle turn-signal arm is placed in either a right turn or a left turn position.