I also recently bought a light up sign thingy, and rather then use the letters that came with it, I made my own slide in word plates. I die cut the letters out of a strip of black cardstock, then inked a sheet of computer paper and stuck behind it.
As you can see, the unlit one is brighter than the lit, but if I have it on at night, it will look awesome. I'm really happy with the way it turned out, and I can easily change the slides whenever I want to.



