Abstract: An adapter structure includes a central socket formed with a lower body arranged for threaded engagement with a conventional first socket, and includes a unitary body formed with a polymeric upper housing coaxially aligned with a second socket, with the upper housing including an abutment flange for limiting projection into the first socket. The invention may further be arranged to include a plurality of radially projecting further socket members, each adjustably mounted utilizing telescoping legs to effect electrical communication and junction between the further socket members and the first and second sockets.