The invention relates to a lamp (1) with a reflector (2) and a light source (3). The reflector (2) has a reflector neck (5) which serves to accommodate the light source (3) and into which the relevant light source (3) is introduced and fixed, possibly after an alignment. Incandescent lamps and in particular gas discharge lamps may be used for the light source (3). In known lamps, the light source (3) used is fastened to the reflector neck (5) by means of a cement. The light source (3) is aligned in the reflector (2), is to be kept in the desired position, and is fixed in place only after the long drying time has elapsed. To simplify the manufacture, according to the invention, a sleeve (4) is provided for fastening to the reflector neck (5) and for accommodating the light source (3). A mechanical fastening of the light source (3) to the reflector (2) can be achieved in a surprisingly simple manner by means of an additional sleeve (4).