Abstract: A flat fluorescent light (1), comprises a discharge vessel that is composed of a based plate (3), face plate (4) and frame (5). A contact system (2) for connecting an electric power supply device by connection lines is integrated into the narrow side of the flat fluorescent light. An insulation body, provided with U-shaped contact sections is located between a section of the base plate (3) and face plate (4), the section acting as a receptacle and projecting beyond the frame (5) of the discharge vessel. The contact surface of the contact sections are connected to the electrodes of the flat florescent light by connection surfaces of the receptacle. The connection parts of the contact sections are connected to the connection lines.

Abstract: A contact system 2 for connection of an electrical supply unit by means of connection lines is integrated in the narrow side of a flat radiator 1 having a discharge vessel comprising baseplate 3, front plate 4 and frame 5. An insulating body, which is provided with U-shaped contact parts, is arranged between a part of baseplate 3 and front plate 4 which projects beyond the frame 5 of the discharge vessel and serves as a receptacle. The contact surfaces of the contact parts are connected to the electrodes of the flat radiator 1 via connection faces of the receptacle. The connection parts of the contact parts are connected to the connection lines.

Abstract: A low-pressure mercury-vapor discharge lamp, which is equipped with Hg or amalgam, has a pumping tube opening (4) with constricted cross-section or lumen. A solid body in the pumping tube (3) prevents the mercury from emerging into the discharge space. At the same time, the particular shape of the constriction and of the solid body, respectively, makes it possible for Hg vapor to diffuse through-passages between the pumping tube and the solid body into discharge vessel.

Abstract: To retain a starting amalgam in a fluorescent lamp, a carrier body (7, 7', 37, 47), for example formed as an iron sheet-metal element of about 2.5.times.7 mm, and having a thickness of, for example, 0.2 mm, is secured to a glass element (6, 6', 36, 46) which retains current supply leads (3, 4, 3', 4') extending into the discharge vessel of the lamp, and holding the filament (5, 5') therein. The carrier body can also be a mesh or a wire; it may be melted into, or glazed-on or melted-on the glass element. This permits locating the starting amalgam close to the hottest portion of the electrode mount for the lamp for rapid supply of mercury upon firing of the lamp.

Abstract: A reflector body for flashcubes containing mechanically ignitable flashbu, said reflector body having a base edge length of .ltoreq. 25 mm and a ratio of base edge length to lateral edge length of .gtoreq. 1 and forming four individual reflectors. The individual reflectors are formed by two planes forming a right angle and by a cylindrical area interconnecting the two planes. At the top end, the plane reflector areas merge across cylindrical and spherical areas into triangular cover planes, at the bottom end, the two planes merge into cylindrical areas.