42187659 SLOIN R D 4500-940 MSC D800 MPO LDE BK Ring-shaped direct distribution LED surface-mounted luminaire, with slim aluminium profile housing in black and MicroPrism Technology optic, ; DALI controllable luminaire with LED converter; LED service life lasts 50000 h before luminous flux is reduced to 90% of the initial value. Chromaticity tolerance (initial MacAdam): 3. Luminaire luminous flux: 4307 lm, Luminaire efficacy: 88 lm/W. Colour rendering Ra > 90, colour temperature 4000 K. Light guided via micro-pyramidal optic with multi-layer construction for defined light emission with UGR < 19. Housing made of rolled aluminium extruded section, seamlessly welded, black powder-coated for a high quality surface finish; accessories for ceiling or wall surface-mounting are supplied. Luminaire wired with halogen-free leads. Glow-wire test: 650°C; Luminaire wired with halogen-free and silicone-free leads; Dimensions: Ø800 x 85 mm, weight: 6 kg.