Abstract: A lamp socket and bulb assembly includes a socket having a generally rectangularly configured bulb opening and first and second side contacts to stabilize a bulb base against multiplanar reference walls in the socket; and wherein the base includes bulb filament contacts, spaced apart parallel reference surfaces and a pressure pad thereon all axially insertable into the socket to make electrical contact between the first and second side contacts and the bulb filament contacts, having a segment that exerts a force on the pressure pad to locate the parallel reference surfaces against one side wall of the socket and a curvilinear segment that engages an outwardly directed tab on the base to stabilize the base within the bulb opening by exerting a pull-in force thereagainst.