LED ceiling-recessed luminaire (pre-assembled luminaire); "stableWhite" LED luminaire, symmetric wide-beam light distribution with maximum luminaire efficiency and optimum photometric properties; lamp(s): 22 W LED830; Colour rendering Ra > 80, colour temperature 3000 K (warm white); Chromaticity tolerance (initial MacAdam): 3; Luminaire luminous flux: 2182 lm, Luminaire efficacy: 99 lm/W; service life: 50000h at 85% luminous flux; includes separate control unit Slave luminaire for DALI control (DALI only); high-quality reflector unit fixed to modular LED lighting chamber by catch mechanism; high-efficiency LED lighting chamber is integrated in optimised, passive thermal management system of diecast aluminium; reflector: smooth, matt aluminized finish; reflector/trim made of high-quality, UV-resistant polycarbonate; white trim, removable; mounting surround of die-cast aluminium; luminaire unit can be fitted quickly without tools using EASY-CLICK catch; IP44_IP20; luminaire wired with halogen-free leads; power connection: 5-pole connector terminal, loop-in/loop-out possible; mains voltage: 220-240V / 0/50/60Hz, for use with 220V DC central battery; tool-free quick installation using spring clips in ceilings of thickness 1-25mm; ceiling cutout: 190x190 mm, recessed depth: 123mm; weight: 1.54 kg; Note: EN12464-compliant with UGR<19 (aluminized reflector type) for office applications