Luminaire housing made of extruded aluminium profile; suitable for rimless installation in plasterboard ceilings; specially designed trim with grooves for better adhesion of smoothing compound; suitable for ceiling thickness of 8-25 mm; surface white powder coated; lighting profile (end cover and mounting bracket pre-assembled) available in advance for installation; remaining lamp components mounted without tools; LED light inset consisting of highly reflective lacquered aluminium for improved thermal management; 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; micro prismatic PMMA diffuser incl. diffuser film for homogeneous illumination and reduced luminance; 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. converter, non dimmable; light source replaceable by an authorized professional; control gear replaceable by an authorized professional; General: Ceiling, Recessed, white, RAL9016, 1680 lm/m, IP20, 3950 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: Microprismatic, UGR < 22, PstLM ≤ 1.0 Electrical: non DIM, 31 W, PC1 220-240V, 127 lm/W, 13 W/m Physical: trimless, length 2348 mm, width 102 mm, height 82 mm, 8.2 kg Cutout: length 2351 mm, width 106 mm, min. ceiling thickness 8 mm, max. ceiling thickness 25 mm, recessed depth 106 mm 052-33L8617Z