With its rectangular cross-section, the powder-coated sheet steel housing in traffic white or white aluminium is a real purist. Because the luminaire connector is already integrated in the housing, the plastic end caps, which are the same colour, are easy to detach and to replace by a suspension bracket for mounting the light run, which accommodates a Y-wire suspension. This saves the mounting of one suspension for each light and thus valuable working time. The louvres appear seamlessly continuous. The through-wiring is quickly and simply implemented thanks to the three-pole plug-in contact connection terminals. When using the accessory for the through-wiring, even the finishing of the wire ends can be omitted. Numerous variants for dimming and emergency lighting can also be implemented by means of accessories or from the factory on request.