You might even already have these things around your house!
Fluorescent light (or other bright lamp - the link is for an Ikea lamp ($9.99 USD)
Clear plastic storage container (larger than your light fixture)
Simply turn the plastic container upside down, put the light inside and viola! You're done!
- Your container doesn't have to be completely "clear" - you could even use a colored container, as long as it is transparent enough to let the light out!
- Most plastic storage containers are flat on the bottom (and lid) to allow them to easily stack, so you should be able to work right on the container
- If you find that you need more/brighter light, you can use a shallow box OR simply stack up some books and put your light fixture on top