light tables can be very useful in traditional artwork from 2d animation
to giving you the ability to easily rearrange different parts of a sketch or multiple sketches during a work's early stages for a better composition. you can even use them to chop shop around parts of a sketch and arrange things the way many digital artist use selection/cut/paste tools to fix small bits of their work.
there are plenty to be found in art supply stores but they can be expensive and every one i've ever seen has required you to be plugged into an electrical outlet for power. sometimes having to deal with a cord while you're trying to turn the table to a different angle is just annoying so lets get on with this instructable so i can get back to the drawing board.