A luminaire is described having a pot-shaped housing for the mounting of illuminants and associated electrical components as well as for the shape matched reception and releasable fastening of a luminaire member, wherein the luminaire is characterized in that the luminaire member includes a first base region corresponding at least substantially to an axial extension of the housing and an external region adjoining it which expands continuously, starting from the base region, in the form of a slanted surface and merges into a central axis of the luminaire body approximately perpendicular to the luminaire member; and in that the illuminant or illuminants is or are positioned and/or designed such that both the base region and the front surface are illuminated with direct light of the illuminants substantially over their full area and the slanted surface is substantially only disposed in the sidelight region.