LED Examination Lamp Illumination Intensity:40,000lx Light Field Diameter: D50=30cm Colour Temperature 6000 - 6500k Colour Rendering Index(RA) :75 Temperature Rising: 0 LED Average Life:Above 40,000 hours Power Input: 110-225V 50/60Hz Kind of extension: 76cm gooseneck Control function: Brightness controlled by dimmer switch