Round luminaire housing in aluminium, rolled profile, seamlessly welded; surface special colours powder coated; highly reflective coating for improved efficiency; suspended luminaire with 1500mm cable suspension; with integrated tool-less suspension height adjustment; incl. feeder cable; microprismatic PMMA cover; completely homogeneous illumination; UGR ≤ 16; VDU compatible workplace luminaire according to DIN EN 12464-1; luminance above 65° ≤ 3000 cd/m²; direct / indirect radiation characteristic for additional accentuation of the ceiling; 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; canopy with 2 cable openings and plug-in terminal for through wiring; degree of protection IP40; 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 replaceable by an authorized professional; control gear replaceable by an authorized professional; General: Ceiling, Suspended, special colours, IP40, indirect 767 lm, direct 1960 lm, total 2730 lm LED: 3000 K, CRI ≥ 80, L90 / 50000 h, photobio. safety RG 0 - no Risk, initial MacAdam ≤ 3 SDCM , MR 0.54, MDER 0.49 Optical: Microprismatic, UGR < 16, ≥65° <3000 cd/m², PstLM ≤ 1.0, SVM ≤ 0.4 Electrical: non DIM, 21.1 W, PC1 220-240V, 129 lm/W Physical: cable 1500 mm, diameter 450 mm, height 87 mm, 3.8 kg 073-124451XK