Sheet steel housing suitable for ceilings with visible T-rails, concealed symmetrical rail constructions and cut-out ceilings, protection class refers to visible luminaire surface, suitable for use in clean rooms and clean room areas according to DIN 14644-1, manufactured according to IPA specifications, as well as the GMP (Good Manufacturing Practice) quality assurance guidelines, direct light distribution using micro-prism disc made of acrylic glass with natural anodized aluminum frame, light color neutral white (840) with very good color consistency and high color rendering Ra>80, for computer workstations, 65° < 3000 cd/m² all-round glare protection according to the current standard DIN-EN 12464-1, electrical connection and connection of the control cable via 5-pin connection terminal with plug-in contact technology.