Abstract: An integrated reflector lamp (1) comprising an outer wall (3,9,13) enclosing a light source (6), a metal reflector (7), and an electronic power supply unit (4) to which the light source (6) is connected, wherein the reflector (7) extends between the light source (6) and the electronic power supply unit (4). Said outer wall (3,9,13) comprises a substantially conical portion (3) and a transparent portion (9) that covers the opening of said conical portion (3). The reflector (7) also covers the opening of said conical portion (3). The reflector (7) and the transparent portion (9) enclose the light source (6), the reflector (7) and the conical portion (3) enclose the electronic power supply unit (4).

Abstract: Low-pressure mercury vapor discharge lamp has a light-transmitting discharge vessel (10) enclosing, in a gastight manner, a discharge space (13) provided with a filling of mercury and a rare gas. The discharge vessel (10) comprises discharge means for maintaining a discharge in the discharge space (13). The discharge vessel is provided with a source of mercury (7). In addition, the discharge vessel is provided with a releasing means (8) for the controlled release of mercury vapor from the source of mercury. The releasing means is operative in response to a condition of the low-pressure mercury vapor discharge lamp, the condition being a characteristic of the discharge lamp and/or a predetermined time interval. The discharge lamp according to the invention operates under unsaturated mercury conditions. Preferably, the releasing means is operated via a switch device, preferably comprising a reed relay.

Abstract: Low-pressure mercury vapor discharge lamp comprises a light-transmitting discharge vessel (10) enclosing, in a gastight manner, a discharge space (13) provided with a filling of mercury and a rame gas. The discharge vessel comprises discharge means (20a; 20b) for maintaining a discharge in the discharge space. The discharge vessel is provided with a container comprising an amalgam (2). The container is provided with releasing means (4) for the controlled release of mercury vapor from the amalgam. The releasing means is open during lamp operation and is substantially closed when, during lamp operation, the temperature of the amalgam becomes higher than a pre-determined temperature. Preferably, the predetermined temperature corresponds to a temperature of a range of temperatures at which the mercury-vapor pressure above the amalgam is relatively stable.