Luminaire body made of sheet steel profile, trapezoidally folded, white end faces made of polycarbonate, cable entries near the center of the luminaire, diffuser fastening by snapping in, direct diffuse light distribution using diffuser profile made of acrylic glass in a satin look, convex with internal longitudinal prisms, attachable white end faces made of polycarbonate, UV-stabilized, electrical connection via 5-pin connection terminal with plug-in contact technology.