It's made of Legos! :D
3 lamps from IKEA with Philips blue light (day light). The good thing about lego's is that you can change its size any time.
Result...
If you don't have Legos, just pick up a card box and design something like this...
Don't forget to use that transparent paper used on cooking (don't know the right term). You need it to diffuse the light.
it's not very pretty :p
Kind regards,
Rui