This is a mod I did to my G5 a year ago. Just added two cold-Neon lights to the top and bottom of the inside of the case. Power runs from the Superdrive via a splitter.
This is a simple, and cheap, mod to do with your computer. I honestly don’t turn on the lights very often, but when I do, WOW does it light up.
Top of the inside G5
Total Price of Mod: $19.95