Abstract: A socket adapted to fit through a hole in a panel and serving to hold a light bulb and connect same to a multiconductor plug comprises a one-piece L-shaped housing formed of dielectric material and having a generally circular-section tubular socket leg and a tubular contact leg. The legs are centered on respective axes and completely laterally imperforate and closed and together they form a continuous L-shaped passage. A dielectric insert sleeve snugly received in the socket leg is provided with formations complementary to a base of a bulb to be mounted in the socket. A dielectric plug fitted in and completely blocking the contact leg is formed with a pair of adjacent throughgoing slits receiving respective conductive contacts strips each having an outer end exposed outside the plug in the contact leg and inner ends projecting into the socket leg and engageable with the base of the bulb therein.