ESN suggested that I post this here, so here it is.This is not a proper tutorial, more just a look at how i made my lightbox, If you take a look you can see that it's not too hard to copy.
It's a cheap black box bought from a junk store. The box is very strong. It has a lid which I used a stanley knife to cut out a section that's about as big as an A4 peice of paper. The peice of glass is bigger than the gap and goes on TOP of the lid. I've used some really strong clear tape and super glue to affix the lid to the box and the glass to the lid.

As you can see the light is just a fluroescant thing only 5 watts. Dont use like 50 watts... you're eyes will hurt.

There is a hole in the box that the light just slips into

You can see here how i taped it, Lots of tape

This is how it looks when it's turned on

One layer of paper Illuminates well, This photo doesn't do it justice

And of course more importantly mulitple layers illuminate well

Feel free to ask any questions but it's pretty simple. The hardest thing to get would be a peice of glass the right size.