Series: FLAT KREIS Decorative round surface-mounted luminaire. Base: plastic. Mouth blown 3-layer opal glass (Triplex glass) with satin finish. Glass fastening: bayonet fixing. Homogeneous and smooth light distribution. Colour: white Diameter D: 500 mm Height H: 100 mm Lamp: LED Socket: without socket Colour temperature: 4000K Colour rendering index (CRI):80 System power 1: 19 W Rated luminous flux 1: 2000 lm Luminous efficiency: 105 lm/W Control gear: AC power, DALI dimmable Protection class: I Type of protection: IP 43