Abstract: A light emitting device (1) includes a tubular light emitter (11) and a pair of caps (14) disposed at both ends of the tubular light emitter. Each cap (14) includes a contact (24) and a pair of catching arms (27) both which of which project from the cap body (22) at approximately a right angle to the tube axis of the cap body (22). During assembly, catching arms (27) serve to protect contact (24) from damage and securely attach each cap (14) to the tubular light emitter. Each cap (14) includes a partition wall with a hole (30) connecting a conductive element (21) to contacts (24). The light emitter (11) may include a tube (12) containing one or more light elements (15) joined by wires (16) additionally operating as positioning elements (20). The socket (2) may include one or more groves for gaskets (42) providing a waterproof light emitter (11).

Abstract: An incandescent lamp (1) to be connected to a socket (11) includes a glass tube (2) having a sealing portion (5) at each end thereof, and a generally U-shaped lead portion (4a) connected to a filament (3) disposed in the glass tube (2) is projected from each sealing portion 5. A socket body (12) of the socket (11) includes a base portion (21) and a pair of socket portions (22) respectively rising from both ends of the base portion (21). Each socket portion (22) is provided with a sealing portion groove (27a) and a lead portion groove (27b), which are adapted to respectively permit the sealing portion (5) and the lead portion (4a) at the corresponding end of the incandescent lamp (1) to be removably inserted. A pair of feeding terminal pieces (34) of a lamp contact terminal (13) are disposed in each socket portion (22) at such a position as to face the lead portion groove (27b).