I'm trying out a similar idea as you on my LOTR, using 1/4 luan board and adhering led strips to it, spacing them about every 4 inches. I would affix the luan board with hinges to the back box, just like any good game would. Im hoping to add LED flashers in parallel to a few on the playfield to make the game more like the classics of the 90's. If you want the leds to stay on constantly, I believe there is a 12V DC tap somewhere (I've not checked yet). I want them controlled with the GI. I am planning on converting 6 v ac from the GI to 12V DC for the led strips. There also is a guy in Australia selling 6 Volt led strips, just tie them into the GI circuit. Hope it helps. Pics to follow in the distant future. Good luck.