Abstract: An incandescent lamp socket having an integral, self-contained current filtering device, such as a diode, is formed of a dielectric body having a lamp base receiving socket in one end thereof, a pair of channels extending from the socket to the other end of the body, a lamp base contact engaging terminal in one of the channels and, in the other channel, a lamp base contact engaging terminal, a power lead terminal spaced from the lamp based contact engaging terminal and a current filtering device, i.e., a diode, disposed between and electrically connected to the two terminals. The current filtering device is thus mounted in series circuit with a lamp fitted in the socket body to prolong the service life of the lamp and to protect the lamp and other electrical components in series circuit with the lamp from electrical transients.