Suitable for surface mounting: Yes; Suitable for built-in mounting: Yes; Adjustability: Not adjustable; Lamp type: LED not exchangeable; With light source: Yes; Lamp holder: None; Housing material: Die-casted Aluminum; Housing colour: Black; Voltage type: AC/DC; Nominal voltage: 220~240 V; Nominal current: 165 mA; Type of control gear: LED operating device current-controlled; With control gear: Yes; Exchangeable control gear: Yes; Dimming DALI-2: Yes; Dimming DALI: Yes; Reflector: High-gloss; Light distributor: Reflector; Light sharing: Symmetric; Beam angle: 70 °; Beam angle: Wide beam 41-80°; Lifetime (L70): 70000 h; Light outlet: Direct; Lifetime (L80): 50000 h; Energy efficiency class of the light source according to EU regulation 2019/2015: E; Equivalent to: CFL 1x18W; Driver failure rate (at 5,000 hrs): 1 %; Application temperature: 25 °C; Rated life time L70/B50 at 25 °C: 70000 h; Storage environment: -25~50 °C; Frequency: 50/60 Hz; On-/Off-cycles: 100000; Colour consistency (SDCM): 3; Degree of protection (IP): IP44; Impact strength: IK02; Protection class: II; Rated ambient temperature according to IEC 62722-2-1: -10~40 °C; Max. system power: 11.5 W; Colour of light: White; Colour temperature: 4000 K; Colour rendering index CRI: 80-89; Rated luminous flux according to IEC 62722-2-1: 1265 lm; Power factor: 0.9; Colour of light adjustable: No; Luminous flux adjustable: No; Beam angle adjustable: No; Width: 165 mm; Height/depth: 58 mm; Length: 165 mm; Outer diameter: 165 mm; Built-in diameter: 150 mm; Type of wiring: Ending; Max. number of luminaires per miniature circuit breaker B16 (MCB): 55; Max. number of luminaires per miniature circuit breaker C16 (MCB): 92; Filament test according to IEC 60695-2-11: 650 °C - 30 s; Weight: 0.45 kg; Beam angle: 70 °; Luminaire efficacy: 110 lm/W; Photobiological safety according to EN 62471: RG0; Dimmability: DALI; Suitable for workplace according to EN 12464-1: Yes; Glow wire test: 650 °C; Operating temperature: -10~40 °C; UGR: 19; Colour consistency (McAdam ellipse): SDCM6; Optical material: Polycarbonate; Unified Glare Ratio (UGR): 19; IP recessed part: IP20; Finishing: White RAL9003; Colour rendering index (CRI): > 80; DC input voltage: See catalogue appendix Connection Specifications; Risk group (EN 62471): RG0 / RG1 (23W & 33W); Input current: 0.06 A; IP front side: IP44; Max. inrush current: 20 A; Inrush time: 356 µs; Max. number of luminaires per miniature circuit breaker C10 (MCB): 57; UGR: ≤ 19; 230V Cable length: 0.3 m; Max. number of luminaires per miniature circuit breaker C13 (MCB): 74; Nominal voltage DC: 180~280 V; System power: 11.5 W