Here's a fantastic project for make your own DIY sketch tracer/light box with some plastic, wood, and aluminum foil.
S1037. Slim LED Light Box S1037. Slim LED Light Box This LED light box (lightpad) is only 5/16" thick! There are 3 brightness levels from the LED bulbs; power is via micro USB and can be used with the included wall adaptor or by connecting to a USB on your computer. This item is warranted for 18 months. Best of all, this lightpad is much less expensive than others on the market. Choose Size: 9"x12" $75.00