A flat, cylindrical, ceiling-mounted luminaire made of white plastic. A highly permeable, evenly illuminated polycarbonate diffuser that is resistant to yellowing. A housing made of light-impermeable white polycarbonate. The luminaire’s lightweight construction makes it suitable for installation on various ceiling types. It also features a high mechanical impact resistance rating of IK07 and ingress protection against splashes of water. The flicker-free power supply ensures continuous, non-flickering light. The product is suitable for surface mounting on ceilings or walls. Protection class II. Tool-free opening of the luminaire in the TWIST system. The luminaire’s increased ingress protection rating makes it an excellent choice for humid rooms and roofed outdoor areas.