Sheet steel housing in square design, prepared for attaching die-cast aluminum end faces or steel luminaire connectors, homogeneous direct/indirect light distribution for standard-compliant suitability for computer workstations in accordance with DIN-EN 12464-1, glare control through microprism panel with special 'multilayer' technology and optimized light-directing film, electrical connection via 5-pin connection terminal with plug-in contact technology. Includes through-wiring.