Round, flat surface-mounted LED luminaire with powder-coated aluminium housing. Opal diffuser with microprismatic structure made of impact-resistant polycarbonate. Colour temperature 3000 or 4000 K. Designed for intelligent lighting solutions with presence- and daylight-dependent constant light control using DALI or DALI-2 presence detectors. SwitchDIM function allows dimming of individual luminaires via 230 V push-button for all versions except SVENJA CL 900 830840. Optional accessories include suspension with a 2-metre shortable wire suspension set or a 1-metre tubular suspension set. Ideal for applications with high requirements for light quality and glare control in accordance with EN 12464-1. Particularly suitable for use in communal areas such as foyers, auditoriums, break areas, lounges, and canteens. The indirect light component of 35% allows luminaires to appear to float on the ceiling and makes rooms appear larger. It provides homogeneous, glare-free illumination and a long LED service life thanks to the flat backlight arrangement of the LEDs and matched lenses. Simple installation is facilitated by a two-part structure with snap lock and electrical plug-in connection.