Center Illumination (Lux) 60000-160000 Single shutter (Lux): 38000 Double shutter (Lux): 50000 Color temperature: 3000k-6700k Spot diameter: ≥110mm Illumination depth: ≥800mm Brightness adjustment: 6 levels of continuous dimming Temperature rise of the surgeon's head: ≤2℃ Power supply voltage: 220V50Hz Input power (VA): 220 Lamp power (W): 150 Color rendering index: ≥85%