LED ceiling-recessed luminaire without trim; designed for use where space is limited in ceiling: recess depth only 100mm; "stableWhite" LED luminaire, with symmetric wide-beam light distribution with maximum luminaire efficiency and optimum photometric properties; lamp(s): LED1800-930; Colour rendering Ra > 90, colour temperature 3000 K (warm white); Chromaticity tolerance (initial MacAdam): 2; total power: 15 W; Luminaire luminous flux: 1750 lm, Luminaire efficacy: 117 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: smooth, highly reflective aluminized finish, 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: 140x140 mm, recessed depth: 100mm; weight: 0.77 kg; Note: Please order seating surround (planar surround) separately for installing the luminaire flush with the ceiling (see Accessories); to achieve EN12464 compliance in office applications (UGR<19, aluminized reflector type), please order an additional antiglare surround