LED ceiling-recessed luminaire, (flush-fitted ceiling model); "tunable white" LED luminaire, dynamic variation of colour temperature with constant luminaire luminous flux can be controlled via DALI signal (DT8 2010 DALI system); symmetric wide-beam light distribution with maximum luminaire efficiency and optimum photometric properties; lamp(s): 22 W LED927-65; colour-temperature variation: 2700-6500K (warm white – neutral white – daylight white); Luminaire luminous flux: 994 lm, Luminaire efficacy: 45 lm/W; colour rendering index: RA90; 50,000h service life at 70% luminous flux; includes controllable ballast, dimmable Dali only (separate unit); control only possible via CIRCLE TUNE or LITECOM (DT8 2010); colour temperature and 15-100% illuminance adjustment can be controlled via DALI signal; high-quality reflector unit fastened to modular LED lighting chamber by catch mechanism; high efficiency LED lighting chamber integrated in optimised, passive thermal management system made of extruded aluminium section; lighting chamber and reflector unit appear as one harmonised unit; reflector: smooth reflector in white enamelled finish; reflector made of high quality, UV-resistant polycarbonate; die-cast aluminium mounting surround; please order seating surround (planar surround) separately; luminaire unit can be fitted quickly without tools using EASY-CLICK catch; minimum luminaire recess depth: 140mm; luminaire wired with halogen-free leads; electrical connection: 5-pole terminal; through-wiring not 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: 140mm x 140mm, recessed depth: 140mm; weight: 1.1 kg; Note: Please order seating surround (planar surround) separately for installing the luminaire flush with the ceiling (see Accessories)