Modular LED ceiling-recessed luminaire with lens optic. Total power: 19.5 W, Slave luminaire for DALI control (DALI only) with LED converter; LED service life lasts 50000 h before luminous flux is reduced to 85% of the initial value. Chromaticity tolerance (initial MacAdam): 3. Luminaire luminous flux: 2630 lm, Luminaire efficacy: 135 lm/W. Colour rendering Ra > 80, colour temperature 3000 K. Symmetric very wide distribution luminaire (wide beam). Light control via square lens optic for glare-free light distribution with ; low dirt sensitivity and simple cleaning; flat sheet steel luminaire housing with enamelled finish in white; 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: 598 x 598 x 74 mm, weight: 6.62 kg