LED ceiling-recessed luminaire without trim; "stableWhite" LED luminaire, symmetric wide-beam light distribution with maximum luminaire efficiency and optimum photometric properties; lamp(s): LED1800-940; Colour rendering Ra > 90, colour temperature 4000 K (neutral white); Chromaticity tolerance (initial MacAdam): 2; total power: 15 W; Luminaire luminous flux: 1834 lm, Luminaire efficacy: 122 lm/W; service life: 50000h at 95% 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: , faceted, aluminized, highly reflective, iridescence-free; reflector made of high-quality, UV-resistant polycarbonate; 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: 126mm; weight: 1.23 kg; Note: UGR<19 (aluminized reflector type) for office applications in compliance with EN12464 Note: Please order seating surround (planar surround) separately for installing the luminaire flush with the ceiling (see Accessories)