Power consumption: 2-3W. Light intensity adjustable: 0-100%. Working distance: 20-160mm. Installation interface diameter: over Φ58-Φ65mm. Operating temperature: -20 ~ + 40 ℃. Intensity: over 40000LUX (at a distance of 80mm). Inner Diameter: 58mm and 65mm as picture showed. It's useful and helpful for fixing the microscope when magnifying electronic components, jewelry identification, precision parts, maintenance & test etc. LED microscope lamp with high brightness, long life, low temperature, low temperature, light and soft no stroboscopic, long service life, energy saving, integrated design, simple and elegant, compact appearance, convenient for installation. Adjustable light intensity, is an ideal source of automation equipment, single cylinder microscope, stereo microscope and other optical instruments and equipment. If you have any questions, you can ask us at any time and we will answer you soon.