Slim LED surface-mounted luminaire with a prismatic light chamber system and integrated LED driver. Luminaire output: 36.5 W LED, DALI controllable luminaire (DALI only) with LED converter. LED service life is 50,000 hours, with a reduction in luminous flux to 90% of the initial value. Colour location tolerance (initial MacAdam): 3. Luminous flux: 5,410 lm, luminous efficacy: 148 lm/W. Colour rendering Ra > 80, colour temperature 4000 K. Glare limitation UGR < 19. Light control and glare control of the direct light component via light chamber system with prismatic light emission surface in white, matte. Closed optical system with contact protection of the LED modules against damage caused by electrostatic discharge. Luminaire housing is made of extruded aluminium profile, powder-coated in white with a visible side height of 27 mm, and die-cast aluminium end caps in luminaire colour white, coated. Rear cover made of sheet steel, powder-coated in white. Luminaire is wired halogen-free. Dimensions: 2480 x 128 x 39 mm. Weight: 7.1 kg.