A slim luminaire for surface mounting, light distribution: direct. DALI dimmable electronic ballast. Housing: sheet steel, white (similar to RAL9016) powder-coated. End caps: sheet steel, white (similar to RAL9016) powder-coated. Light direction via a luminance-reducing, multi-layer optic (LRO) made of PMMA, with backlight, UGR < 19. Closed optic system to prevent damage due to electrostatic discharge. Ideal for schools and offices. Protection class I, IP20, impact resistance: IK03. Electrical connection via screwless terminal block. Includes LED module with 4000K. Can be used as a direct pendant luminaire when combined with the Y-suspension connection and the suspension accessories (order separately 22171581 and 22171349). Dimensions: 1542 x 162 x 50 mm Lamp power: 27.7 W Lamp luminous flux: 3710 lm Lamp luminous efficacy: 134 lm/W Weight: 6.5 kg