A ceiling luminaire shaped like a slightly convex cylinder made of white, opal plastic with a decorative gray ring. A highly permeable, evenly illuminated PMMA diffuser that is resistant to yellowing. The illuminated ceiling effect around the luminaire is achieved thanks to the light-permeating vertical plane of the diffuser. The luminaire’s low glare rating makes it an excellent choice for offices. The color of the decorative ring can be specified by the customer. White-painted steel sheet housing. Suitable for surface mounting on ceilings or walls. Tool-free opening of the luminaire in the TWIST system. Three diameter variants allow for the luminaire to suit many different applications.