Installation lamp (1), suitable for installation in a mounting opening, comprehensivea mounting position (2) with an external flange (20),a base body (3) fitted to the mounting position (2) or fully equipped with the mounting position (2); anda headlamp (4) with a luminous design (5) for the reception of a luminaire (6) fitted to the base body (3) marked by:the base body (3) has at least two adjacent horizontal sections (30, 31) in which each has a longhole (10, 11);at least two laterally protruding guide sections (43, 44) designed and dimensioned to be mounted on one of the support sections (30, 31) of the base body (3), each of which has a thread (43, 44); andThe mounting lamp (1) has at least two safety screws (12, 13) extending through one of the longholes (10, 11) and intervening in one of the threads (49) of the guide section (43, 44) of the holder (4).
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