Ya! It'll be fine considering that you put all the LEDs in parallel. But, I'm no so sure how you would light up the triggers. You would need to get some custom triggers made out of a transluscent plastic.
Although, if that seems like too much work. You can just settle for llamma's start and back buttons
. I bought a set and I'm satisfied. But, I don't think their worth the 5 bucks or whatever I paid.