The Smallest and Lightest LED Loupe-Light. Designed by Dentists and Opthalmologists, smaller than a dime (0.65??? in diameter) and lighter than a nickel (0.13oz or 3g). Feather Light LED is the LIGHTEST and SMALLEST LED loupe-light. The revolutionary optical design and use of aircraft-grade aluminum alloy allows Feather Light to be the most optically efficient. With the largest selection of customized mounting brackets that customers can apply with Loupe or eyeglasses. The lithium ion battery provides 8 hours of consistent brightness on the highest setting, allowing you to work with lighting for the full working day. It can also fully charge with our quick charger in under 3 hours.