You'll like this. I wasn't liking my idea for lighting the acrylic. I had bought some LEDs but I don't think they will be anywhere near bright enough for the effect I want. But I do have some red 6" ccfl lights lying around. I took the lighting element itself out of the plastic tube they come in. I plan on embedding these into the acrylic. They are small enough I can cut some channels in strategic places and I hope I can get by with four bulbs. The term "cold cathode" is kind of a misnomer. They aren't heated independently like some fluorescent lights, but they do give off a good amount of heat. The acrylic should be able to handle it, I've been testing one for a while now and it seems to be safe to use without the plastic sleeve. As a demonstration I grabbed one of the scrap pieces I had been practicing my bends with (I picked the one that already had some polished edges).
I've taped the ccfl to the end with some alu tape to make sure all the light you are seeing is coming from what is traveling through the acrylic. Behold!
Now of course this will be wedged between the case and the outer shell so all you will see are the edges. But this also includes the three fan hole cut-outs and the cut-out for the PCI and I/O area of the mobo tray. I can't wait to put this into action.