Illumination (LUX at a distance of 1M): 160000-180000 (adjustable) Color temperature (K): 4300±500 Spot diameter (mm): 100—300 Illumination depth (mm): ≥1200 Brightness adjustment: 1-100 Color rendering index CRI: ≥97% Color reproduction index Ra: ≥97% Surgeon's head temperature rise (℃): ≤1 Temperature rise in operating area (℃): ≤2