Slim LED surface-mounted luminaire with a prismatic light chamber system and integrated LED driver. Luminaire output: 38.2 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: 5400 lm, luminous efficacy: 141 lm/W. Colour rendering Ra > 80, colour temperature 4000 K. Glare limitation UGR < 19 and L65 < 3000 cd/m² in accordance with EN 12464. Light control and glare control of the direct light component via light chamber system with prismatic light emission surface in silver, glossy. Closed optical system with contact protection of the LED modules against damage from electrostatic discharge. Luminaire housing made of extruded aluminium profile, powder-coated in silver with a visible side height of 27 mm, die-cast aluminium end caps in luminaire colour silver, coated. Rear cover made of sheet steel, powder-coated in white. Halogen-free wired luminaire. Dimensions: 2480 x 128 x 39 mm. Weight: 7.1 kg.