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, direct light distribution via opal diffuser 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, electrical connection and connection of the control cable via 5-pin connection terminal with plug-in contact technology.