Recessed luminaire having a dome-shaped reflector

A recessable luminaire comprising:

• a dome-shaped reflector formed with a lead-through hole in a reflector side wall thereof;
• a light source carrier carrying a light source, said light source carrier being located at least partially outside said reflector such that the lead-through hole is passed through by said light source carrier or the light source and such that at least the light source is located within the reflector;
• and
• a mounting ring arranged to engage said reflector around and near its edge region, said mounting ring having connection means for attaching said light source carrier thereto,
• said connection means being realized by means of a single plug-in pin on said mounting ring or on said light source carrier and extending approximately parallel to a middle axis of said mounting ring, and a corresponding plug-in fitting on said light source carrier or said mounting ring,
• said plug-in pin and plug-in fitting forming a mounting which secures against a pivotal movement, by means of which said light source carrier is connected exclusively with said mounting ring, and
• said plug-in fitting and said plug-in pin having a cross-sectional form which extends in an elongate manner in the circumferential direction.