Abstract: An opto-electronic element (1) is mounted on a substrate (2) comprising an electric circuit (3, 3′) with an electrically conducting layer (4, 4′). The opto-electronic element (1) has a body (5) for emitting light in a pre-selected wavelength range and is provided with current conductors (7, 7′) which contact the conducting layer (4, 4′). According to the invention, an adhesive material (8) is used to mount the opto-electronic element (1) on the substrate (2) with clearance with respect to the substrate (2), the body (5) contacting the substrate (2) via the adhesive material (8). Preferably, the adhesive material (8) is a heat-conducting material which serves to cool the body (5) during operation. In order to make a reliable interconnection, the geometry of the current conductors (7, 7′) is optimized in such a way that a small tensile force (order of magnitude 1 N) is present in a weld between the current conductors (7, 7′) and the conducting layer (4, 4′).

Abstract: A discharge vessel (10) closed in a gastight manner has a cavity (11) enclosing a discharge space provided with an ionizable filling. A coil (20) with a winding (21) of an electric conductor and an assembly (30) of a heat conductor (31) and one or several elongate cores (32) of soft-magnetic material are accommodated in the cavity. The cores (32) are arranged along a longitudinal axis (33) of the heat conductor (31) in one or several recesses (34) of the heat conductor which issue into a circumferential surface (36) of the assembly (30). The heat conductor (31) occupies at least half the circumference in a cross-section perpendicular to the longitudinal axis (33) of the assembly (30). The construction of the lamp according to the invention renders possible lamp operation at higher lamp powers also without the use of a heat pipe.