A bumper for a vehicle having an extruded light metal alloy hollow section with section walls in the form of a compressive strut and a tensile strut which are spaced apart and a pair of transverse walls joining them. A power supply and monitor screen are provided in the monitor housing such that when the logic module is mounted and electrically connected within the monitor housing a generally complete computer unit is provided. A plurality of induction coils is arranged stationary in an area of the device adjacent to the plug support plate, and the plug support plate has an induction element of inductively heatable material. The locking component has a plurality of resilient extensions configured to engage the plurality of slots of the compression member. The dense insert increases the flexural stiffness of in a central zone of the hitting face so that a golf club head that has a larger zone of substantially uniform high initial ball speed. In order to provide a lamp that can be easily manufactured and is well suited for operation at reduced power, the discharge vessel wall is of externally and internally cylindrical shape.