Apollon® 21 square, office luminaire. * lighting technology 1: - primary optical cover: micro prismatic cover, of PMMA, - CAT 2 (L<= 3000cd/m²), - UGR viewing direction along longitudinal luminaire axis ≤ 22 (X = 4H | Y = 8H | S = 0.25H | reflection values 70/50/20), - UGR viewing direction along lateral luminaire axis ≤ 22 (X = 4H | Y = 8H | S = 0.25H | reflection values 70/50/20), - primary emission direction: below, - primary beam angle: wide distribution, 90°, - light emission: direct distribution, - primary light characteristic: symmetric, - laterally positioned lamps, concealed from below. * mounting: - installation arrangement: single arrangement, - installation type: lay-in mounting, - installation location: in the ceiling. * electrical 1: LED, - rated luminous flux: 1.700lm, - luminous efficacy: 113lm/W, - light colour: 830, - colour temperature: 3000K, - colour rendering: CRI > 80, - control gear: ECG DALI, - with terminal, 5-pole, - mains connection: 220..240V, AC, 50/60Hz, - rated input power: 15W. * component: - housing, of sheet steel, coated, pure white. - length: 296mm, width: 296mm, height: 40mm, - weight: 0,8 kg. - housing upper side, of sheet steel, galvanised. * testings/approvals/admissions: - protection rating (complete): IP20, - protection rating (lamp compartment, on room side): IP50, - insulation class (complete): insulation class II (safety insulation), - certification: CE, ENEC, - permissible operating ambient temperature: -20..+40°C. * service life: - rated service life: 50.000h (L85/B50) at AT= 25°C. - packaging unit: 1 piece, - ultra-slim construction. * manufacture: Siteco, Apollon® 21 square. * type: 51MQ13WD2313.