42933334 LF3 A 4200-840 L15 LDE WH Surface-mounted ceiling luminaire with frameless look, 100% uniform illumination, laser-welded MPO+ micropyramidal optic with light accent. , DALI controllable luminaire with LED converter; LED service life lasts 100000 h before luminous flux is reduced to 95% of the initial value. Chromaticity tolerance (initial MacAdam): 3. Luminaire luminous flux: 4210 lm, Luminaire efficacy: 125 lm/W. Colour rendering Ra > 80, colour temperature 4000 K. LEDs coupled in on both sides; Light guided by high-efficiency LitePrint® waveguide technology based on multilayer MPO+ micropyramidal optic with seamless look and defined light emission for glare-free light distribution with UGR < 19 and L65 < 3000 cd/m² as per EN 12464; reduced luminance at steep angles specifically designed to cut glare on tilted displays and allow maximum flexibility; evenly spaced LED light points; laser-welded light chamber ensures touch protection and prevents entry of insects and dirt particles; simple cleaning due to smooth outer cover of high grade polymethylmethacrylate; high quality luminaire housing made of powder coated sheet steel, with all-round optic frame without seam or gap in white; inner 5-pole screwless connecting terminal; Installation as single luminaire or as cluster, Luminaire wired with halogen-free leads; Dimensions: 1446 x 267 x 51 mm, weight: 10.36 kg.