LED surface-mount ceiling luminaire (pre-assembled luminaire); lamp(s): 1/18W LEDs, neutral white; includes control gear, dimmable Dali only, optional switchDIM; power consumption: 18W; colour temperature: 3500K (neutral white); luminous flux >1000lm, luminaire efficiency 55lm/W; colour rendering: CRI RA 92; service life: 50,000h at 70% luminous flux; glare control: UGR 19 (decorative cover ring in highly reflective aluminized finish), UGR 22 (decorative cover ring in matt aluminium-look finish) and UGR <25 (decorative cover ring in white finish); built-in, patented, sensor-controlled system for stabilising the colour temperature over the entire service life; surface-mount housing made of aluminium sheet and white painted sheet steel; includes decorative cover ring, inside surface in aluminium-sputtered finish, smooth, mirrorbrite and white outside surface; degree of protection: IP40; class of protection I; mains voltage: 220/240V 50-60/0Hz; suitable for use with 220V DC central battery; through-wiring possible; power connection: 5-pole terminal for 5x1.5 mm² leads; luminaire unit can be fitted quickly on ceiling using twist-and-lock mechanism; Dimensions: Ø195 x 218 mm; weight: 2.37 kg;