Particularly flat luminaire housing, extruded aluminum profile, naturally anodized, visible height 30mm, front sides and side parts made of naturally anodized aluminum with continuous longitudinal groove, rounded towards the underside of the luminaire. Direct/indirect light distribution, direct component using a frosted PMMA pane, homogeneous light emission through lateral LED light coupling and an aluminum reflector with a highly reflective white coating, with micro-perforations for light ceiling illumination. Integrated LED driver design. Electrical connection and connection of the control line via a 5-pin connection terminal using plug-in contact technology.