Adjustable Brightness Microscope Bottom Light Lamp LED Backlight Illuminator, Round Light Source AC90V-240V Eliminate Shadow Reflective for Monocular, Binocular Microscope, Trinocular Stereo Microscope, etc.Specification:Input voltage: AC 90-240V, 50/60HzInner diameter size: 63mmOuter diameter size: 90mmThickness: 7mmOutput voltage: DC12VService life: >100000 hoursBrightness adjustment: 0-100% adjustmentColor Temperature: 6000K-6500KPower: 4.5WLuminous color: white lightMaterial: metal shellProduct Color: blackSuitabl for: stereo microscope, monocular microscope and other automation equipment.