Abstract: A metal halide lamp with ceramic discharge vessel (4), the discharge vessel having two ends (6) that are sealed with ceramic stoppers that in each case contain an elongated capillary tube (12), termed stopper capillary below, of inside diameter K, and wherein an electrically conducting lead-through (9, 10), which comprises an inner part (14) and an outer part (13) with reference to the discharge, is guided through this stopper capillary (12) and is sealed outside with glass solder (18), there being fastened on the lead-through an electrode (16) with a stem (15) that projects into the interior of the discharge vessel, the outside diameter S of the inner part being coordinated with the inside diameter K, the inner part (14) being a composite component that comprises a core pin (18) of diameter D onto which there is mounted as a double ply a coil with an effective diameter d of the core wire, the following relationships being fulfilled:

Abstract: To reduce heat loading of a luminaire or lamp fixture in which a halogen andescent lamp, retained in a reflector, is installed, the bulb of the halogen incandescent lamp is coated with a heat reflecting or mirror coating so that heat radiated from the filament (3) of the lamp (2, 10) is reflected from the surface of the bulb back into the bulb, rather than being directed from the filament to the reflector so that a portion of the radiation is diffusely transmitted from the lamp through an outer covering (6) thereof. If the reflector is only partially IR reflective, the remaining portion which can pass to heat the fixture or luminaire is small enough so that its temperature rise will be within an acceptable range. Thus, forwardly directed heat radiation is not focused, as is the visible light, and heat loading on an illuminated object is substantially reduced, without excessive heat loading of the fixture or luminaire.

Abstract: To permit ready insertion of a holding frame for a filament into an essentially tubular bulb, particularly a halogen incandescent lamp bulb made of quartz glass or hard glass, the frame has two legs extending along the wall of the bulb, connected by a holding portion to hold the filament at the end remote from the current supply leads to the filament, one of the legs of the frame is shorter than the other, for example only about one-third the length of the bulb. The longer leg of the frame can be pinch-sealed in a pinch seal closing off the bulb. The holding portion, which is intermediate the two legs, is preferably U-shaped to form a hook into which the filament can be hooked; or, particularly if the legs of the U are close together, about which the filament can be wound.

Abstract: To support a filament, or filament structure, in a halogen incandescent l, which may have a V or U filament, a straight filament, or be of the lumiline type, support ribs are placed within the lamp, which support ribs are formed from the lamp bulb material itself, by deforming the lamp bulb after local softening, for example by punches or by applying a vacuum, to provide interiorly extending, essentially tubular ribs. The tubular ribs may have circular or oval cross section, and can be placed to engage the filament to, for example, pinch the filament therebetween. In the pinching regions, the filament preferably is straight or only single-coiled and may be supported by a core pin.