The Ray interior wall luminaire allows for versatile room illumination since it can either be arranged as a single lamp or in a group. When installed as a group, its three-pointed contour enables a multitude of visually appealing compositions. The body of the luminaire is made of white-coated steel while the LEDs on the inner side use the wall as a reflection surface. In this way, the light concept plays with the perception of the room, conveying an architectural character.