Luminaire body made of deep-drawn sheet steel with foam seal and rotary lever locks, direct/indirect light distribution using an acrylic glass diffuser with opal coloring, drawn from a single piece with stable corners, including multi-lumen driver with 4 adjustable light outputs, electrical connection via 3-pin connection terminal with plug-in contact technology. Note on protection class: IP50 for ceiling and wall mounting, IP40 for mounting rail and pendant mounting.