This is a nice little lamp that uses CDs. You will need lots of CDs, a fluorescent light and some plywood. From the webpage:
In the end I used 61 CDs. The CDs are grouped in pairs with the shiny side out. I used washers between the pairs of CD'S as spacers. To start the stack of CDs I used a single CD on the base of the unit. To finish I covered the stack with two pairs (4 CD) on the top without their centers enlarged (untouched).
Instructions and pics here.