Surface-mounted LED luminaire for single use or trunking applications. Surface-mounted luminaire for ceiling mounting. With separately ordered installation accessories also suitable for use in strip ceilings (SFlow ZBP L2). For strip ceilings in module 100. Also suitable for suspended mounting by means of accessories to be ordered separately (ZS1P 2000). Optical system with micro-reflector technology (MRWD) and highly efficient, white-polished plastic reflector chambers with diffuser cover for uniform illumination and maximum visual comfort. With additional clear cover integrated in the optical system, flush fits on the room side and protects the LEDs. Discreet lateral light emission over the complete luminaire length. With Lambertian light distribution. Luminaire luminous flux and light color fixed. LED system and luminaire optic are clicked without tools into the luminaire body as a single assembly. Assembly is protected from falling down during mounting with a steel cord. Luminaire luminous flux 4000 lm, connected load 31 W, maximum luminous efficiency of luminaire 129 lm/W. Light colour neutral white, correlated colour temperature (CCT) 4000 K, general colour rendering index (CRI) Ra > 80. Colour locus tolerance (initial MacAdam) ≤ 3 SDCM. Mean rated service life L80(tq 25 °C) = 50,000 h. The light source is replaceable according to the ecodesign requirements (VO (EU) 2019/2020). Luminaire body sheet steel. Surface coated silver-grey (RAL 9006). Dimensions (L x W): 1413 mm x 84 mm, luminaire height 45 mm. Permissible ambient temperature (ta): -20 °C - +. Safety class (EN 61140): I, protection rating (DIN EN 60529): IP20, impact resistance level in accordance with IEC 62262: IK03, testing temperature of wire glow test in accordance with IEC 60695-2-11: 650 °C. Weight: 4,0 kg. Connection on mains side is via plug-in terminals. Independent electrical connection of assemblies. With electronic control gear unit, switchable. The control gear unit is replaceable in accordance with the ecodesign requirements (VO (EU) 2019/2020). The luminaire complies with the fundamental requirements of applicable EU regulations and product safety legislation and bears the CE symbol. The luminaire is also ENEC-certified by an independent testing authority. Luminaire available for 10 years, spare parts (LED module, control gear unit, optical system) for 15 years from date of invoice, subject to reasonable modifications in the interests of progress.