Round luminaire housing in die-cast aluminium; attached ring in rolled and seamlessly welded aluminium profile; surface dark grey powder coated; suitable for wall or ceiling mounting; time saving installation through snap-in mounting system; LED board highly reflective lacquered for higher efficiency; same luminance for all size versions; light colour 4000 K; binning initial MacAdam ≤ 3 SDCM; CRI ≥ 80; min. 90% of luminous flux after 50000 operating hours; energy efficient LEDs with high CRI; completely homogeneously illuminated, satin PMMA cover; luminaire with 2 cable openings and plug-in terminal for through wiring; degree of protection IP54; PC1 220-240V; photobiological safety according to IEC 62471 risk group RG 0 - no Risk; internal wiring in light halogen free; incl. converter, non dimmable; light source not replaceable; control gear replaceable by an authorized professional; General: Ceiling / Wall, Surface, dark grey, RAL9007, IP54, 5730 lm LED: 4000 K, CRI ≥ 80, L90 / 50000 h, photobio. safety RG 0 - no Risk, initial MacAdam ≤ 3 SDCM , MR 0.72, MDER 0.66 Optical: Opal, UGR < 25, PstLM ≤ 1.0, SVM ≤ 0.4 Electrical: non DIM, 43 W, PC1 220-240V, 133 lm/W Physical: diameter 600 mm, height 80 mm, 6.2 kg 871-815661DO