22171735 CIELUMA SQUARE INFO Large-format LED light- and acoustic ceiling in square form, with high quality profile frame housing in white powder-coated RAL 9016 or in RAL colour of choice, in construction height 66, 80, 120 or 150 mm, made of aluminium and translucent, seamless and fabric covering of flammability class B1 (flame-retardant or A2 (non-combustible), according to EN 13501. Luminaire efficiency: up to 217 W/m², luminaire with LED converter DALI dimmable or controllable via wireless connection via app with Bluetooth® 4.x - basicDim Wireless; LED service life 50000 h up to a luminous flux reduction of 70 % of the initial value. Colour location tolerance (initial MacAdam): 3. Luminaire luminous flux up to 13,500 lm/m², luminaire luminous efficacy: up to 70 lm/W. Colour rendering Ra > 90 or > 98, colour temperature 3000, 4000, 6000 or 2500-6500 K or in combination with RGB. Covering made of UV-resistant polyester fabric or glass-fibre fabric in one layer or with innovative two-layer construction with dirt trap level to avoid visible shadow fragments when insects or dust enter and LED backlit concept for uniform illumination right into the corners and edge areas. Lambertian light distribution with UGR < 19 and L65 < 3000 cd/m² according to EN 12464:2011 depending on the selected luminous flux; evenly spaced LED light points. Luminaire without acoustics or optionally with acoustic efficiency with a sound absorption coefficient depending on the configuration of αw= 0.5 till 0.65 (option AV) or αw= 0.75 till 0.85 (option AV+) according to ISO 11654. Delivery in prefabricated individual segments for simple and time-efficient assembly on-site or optional delivery with on-site assembly service by qualified personnel (lifting equipment to be provided by customer). Accessories and small parts required for mounting are supplied for surface mounting (option MSC), pendant mounting by means of suspension cord (option MSP), pendant mounting by means of threaded rod (option MSP+), wall mounting (option MSW). Luminaire wired with halogen-free leads; dimensions: Min: 200 x 200 x 66/80/120/150 mm, Max: 75000 x 4900 x 66/80/120/150 mm, Weight: up to 15 kg/m².