Indoor luminaire. Assembly: mounted in suspended ceiling. The body material is steel sheet. Colour - RAL 9016 (white). Dimensions: 650 x 650 x 55-75 mm. Mounting hole: 616 x 616 mm. Weight 15,1 kg. Diffuser: SHM (hardened mat glass). The efficiency of the optical system is 79,10%. Beam angle: (C0-C180) / (C90-C270) - 109,6° / 109,6°. Light source type: LED. Colour of the light 4000 K. SDCM=3. CRI>80. Lifetime of LED sources: 100000 h L80/B10. Luminaire luminous flux: 5983 lm. Power of luminaire: 39,9 W. Luminaire's light efficiency: 149,9 lm/W. Driver: standard on/off (E). Voltage 220..240 V, 50..60 Hz. Power factor cosφ: >0,95. Circuit load capacity: 16 (B10), 26 (B16), 23 (C10), 37 (C16). Operating temperature range: 5 ÷ 30° C. Protection degree: IP65. Impact resistant: IK08. Protection against electric shock: I. Photobiological risk class (IEC/EN 62471): RG0. The luminaire can be made in CLO (Constant Lumen Output) version.