LED ceiling-recessed luminaire without cover frame "trimless", "warmDimming"; cut-off angle 60°; lamp(s): 12 W LED918-27; Colour rendering Ra 90, colour temperature "warmDimming" 1800-2700 K (warm white), automatic colour temperature modification depending on dimming level; Luminaire luminous flux: 892 lm, Luminaire efficacy: 74 lm/W; service life: 50000h at 70% luminous flux; includes control unit Slave luminaire for DALI control (DALI only); modular, high quality optical unit consisting of reflector and LED light chamber integrated in optimised thermal management of die-cast aluminium; smooth reflector highly reflective aluminized finish, iridescence-free; reflector made of high-quality, UV-resistant polycarbonate; luminaire unit fitted quickly without tools using twist-and-lock mechanism; 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 antislip spring clips in ceilings of thickness 1-40mm; ceiling cutout: 100mm, recess depth: 103mm; weight: 0.45 kg; Note: UGR<19 for office applications compliant with EN12464 (depending on luminaire type) Note: Please order seating ring (planar ring) separately for installing the luminaire flush with the ceiling (see Accessories)