Ring-shaped light fitting in die-cast aluminium; extremely slim design; surface white powder coated; luminaire housing set away from ceiling; electronic operating unit installed in the surface mounted housing: surface mounted housing aligned from the ring to the center; blind cover to cover the cut-out, held by magnet, available as an accessory; accessories are listed separately; light colour 3000 K; binning initial MacAdam ≤ 3 SDCM; CRI ≥ 80; min. 90% of luminous flux after 50000 operating hours; energy efficient LEDs with high CRI; HPO (High Performance Opal) cover for uniform illumination; direct / indirect radiation characteristic for additional accentuation of the ceiling; degree of protection IP20; PC1 220-240V; photobiological safety according to IEC 62471 risk group RG 0 - no Risk; internal wiring in light halogen free; incl. DALI-2 converter; light source replaceable by an authorized professional; control gear replaceable by an authorized professional; General: Ceiling, Surface, white, RAL9016, IP20, indirect 136 lm, direct 2700 lm, total 2840 lm LED: 3000 K, CRI ≥ 80, L90 / 50000 h, photobio. safety RG 0 - no Risk, initial MacAdam ≤ 3 SDCM , MR 0.56, MDER 0.51 Optical: Opal, Symmetric, PstLM ≤ 1.0, SVM ≤ 0.4 Electrical: DALI-2, 24.9 W, PC1 220-240V, 114 lm/W, 1 DALI Addr. Physical: diameter 426 mm, height 72 mm 074-7531537O