Technical Parameters:500 LED head
illuminance adjustable range : 25% - 100% 
K Color Temperature :4000-5000K 
CRI RA :95         R9  :90  R13 :92 
50% Spot Diameter (D50):  120 mm
10% Spot Diameter (D10):  230 mm
Illumination Depth:  120 cm
Ultraviolet light irradiance within40nm wave length:0.002W/M2
Terperature at surgeon's head:≤ 2°C
Focus mode: manual or electric(optional,but price is different)
Power Supply: 220V,50HZ 
Lamp Beads Power: 1W *40N
The Average Life Expectancy H Lamp Beads: 50,000 Hours