Aphrodite US Stock New 3.5x 420mm Surgical Binocular Loupes +Head Light Lamp +Aluminum Box Red The most popular model among dental students ,dental hygienists and dentist. Wide field of view and generous depth of field with high enough power for daily procedures. Portable LED headlight High intensity&gt;15000-30000Lux Continuous run-time:&gt;5 hour The power of the LED bulb:3 W The lifetime of the bulb:10000 hour