Operating light Model:ZF700/700 Illuminance(Lux) 80,000-120,000 80,000-120,000 Color temperature(K) 4300 Diameter of spot(MM) 100-300 100-300 Illuminance depth (MM) ≥700 Brightness adjustment　 16-steps continuous light adjustment Temperature rise (working area)(℃) ≤ 12 Operator head temperature rise(℃) ≤ 2 Lamp Switching Automatic Power supply voltage 220V/50HZ Bulb Type Halogen bulb Service Life of Bulb 1500 hours Lowest height of installation 2900mm Color Rendering Index (CRI) 93