This lightbox is 3/8" thick and features dimmable LEDs that provide an even spread of light from edge-to-edge. It weighs only 2 lbs. and is very light-weight. It features a built-in ruler grid and is ideal for tracing, calligraphy, stenciling, embossing, quilting, embroidery, sewing and more. The lightbox is powered by an AC adapter and produces a very low heat.