Abstract: A device for prolonging the life of an incandescent lamp includes a rectifier unit adapted for attachment to a lamp base and subsequent insertion into an appropriate lamp socket along with the lamp. The rectifier unit employs a leadless diode chip which is positioned off center within the socket so that the forces applied to the rectifier unit as the lamp is being screwed into the socket will not be applied directly to the diode chip. The rectifier unit also employs a pair of recessed electrical contacts attached to the diode chip and designed to minimize the distance that the unit raises the lamp in the socket and to conduct away the heat generated by the diode chip.