A luminaire includes a first housing portion having a first knockout, a second housing portion having a second knockout, first and second apertures formed in one of the first and second housing portions, and at least one protrusion formed in the other of the first and second housing portions. The first housing portion and the second housing portion are selectively connectable to one another in a first configuration by the at least one protrusion received within the first aperture, and a second configuration by the at least one protrusion received within the second aperture. An upper surface of the first housing portion and a lower surface of the second housing portion are spaced apart by a first distance in the first configuration with the knockouts forming a first shape, and by a second distance in the second configuration with the knockouts forming a second shape.