Hi Steve
Sorry for the late reply, didn't see the reply until now.
I built the Lightbox myself, basic DIY skills and your off. I made wood frame that the snap frame screws into. Cut an MDF sheet for the back which has a set of led lights attached - Brought in a 5m or 10m roll off ebay - cut into strips then soldered each of the strips together about halfway up due to voltage drop when they were connect at each end. I then attached a switch to turn on/off. Run off a transformer similar to a laptop charger.
I will try and dig out some of the images from the build if I can find them.
Hope that ramble makes sense.
Cheers
Simon