Square recessed LED luminaire with translucent cover. Version M84 (625 mm x 625 mm). For system ceilings with exposed grids. The luminaire is also suitable for surface-mounted installation with an accessory ordered separately.. The luminaire is also suitable for applications in plasterboard ceilings with an accessory ordered separately. (Siella ZBB/4). Further information and data regarding luminaire installation and fixing can be found in the installation instructions. Cover of translucent PMMA. With Lambertian light distribution. Harmonious light effect due to homogeneously illuminated light emission. Luminaire luminous flux adjustable in 3 steps, light color adjustable in 2 steps. Luminaire luminous flux 2700 lm - 4100 lm, connected load 22 W - 33 W, maximum luminous efficiency of luminaire 128 lm/W. Light colour warm white or neutral white, correlated colour temperature (CCT) 3000 K or 4000 K, general colour rendering index (CRI) Ra > 80. Colour locus tolerance (initial MacAdam) ≤ 4 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). Frame made of aluminium, rear luminaire body made of sheet steel. Surface coated white (RAL 9016). Dimensions (L x W): 620 mm x 620 mm, luminaire height 29 mm. 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: 1,1 kg. With external operating device, 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.