Modular LED ceiling-recessed luminaire with opal optic. Total power: 17.5 W, Slave luminaire for DALI control (DALI only) with LED converter; LED service life lasts 50000 h before luminous flux is reduced to 80% of the initial value. Chromaticity tolerance (initial MacAdam): 3. Luminaire luminous flux: 2340 lm, Luminaire efficacy: 134 lm/W. Colour rendering Ra > 80, colour temperature 4000 K. Light guided via backlit embossed opal optic UGR < 19 to EN 12464:2011; evenly spaced LED light points; LED modules include high reflection 3Dprotect reflector as protective cover to prevent damage from electrostatic discharge, removable outer PMMA diffuser for homogeneous appearance and simple cleaning; luminaire housing made of sheet steel enamelled in white; Luminaire with external electrical connection; installation as height-adjustable luminaire for cut ceiling apertures and modular ceilings with concealed or visible grid system; please order fixing kit separately; Luminaire wired with halogen-free leads; Dimensions: 1198 x 298 x 85 mm, weight: 5.1 kg