Tubular wall surface luminaire made from aluminium; surface White Matt; powder coated; matt texture; opal PMMA; PCB 3-step binning; light colour 2700 K; binning initial MacAdam ≤ 3 SDCM; CRI ≥ 90; inclusive output selector (choose between low and high luminosity); degree of protection IP44; Class 1; light source replaceable by Wever & Ducré or by a professional with explicit authorization;