Thanks!
You can make it just about as simple as you like. The controller PCB in my unit was made on the light panels that is now in the unit. I just placed one of the panels on the work bench, placed a spacer on each side of the panel, and then placed a piece of plexiglass over the spacers. Then I hooked the panel directly to a 12V power supply and timed it with a stop watch.
I recommend taping the LED strips to a metal plate. They generate a bit of heat and the metal help dissipate it. I isolated the steel plates with a thin self adhesive plastic film before gluing down the LED strips to make sure they did not short against the metal.
Unfortunately I did not take any proper pictures of the panels before I assembled it, and I have not got around to take it apart to get them later either. But the panels are very simple to make. I just made a "power bar" with double strips of 5mm copper tape along the two edges of the panel. One hooked to GND and one to 12V. Then I taped short stubs of copper tape from each bar to each of the respective + and - connection on the LED strips (all plusses on one side and all minuses on the other). At the end I applied solder to each joint to make sure there was a proper connection.
Make sure that you power each of the two power bars and not just apply power to one end of the first LED strip. That will cause a significant voltage drop in the first LED strip as all the current to all the LEDs will go through it. You can either solder the supply wires to each of the power bars, or what I did was to place another double strip of 5mm copper tape from one side of the panel to the other and then attach both supply wires there.
So to make a very simple UV box, just make one of these panels and place it in a box with the right depth and then cover the box with plexiglass (or normal glass). You might be able to find a picture frame with the right depth and then the whole project would be very simple