I'm very new to this, but really want to learn so please take it easy on me...I just saw that some people use real crystals! How does this work? Is it just for looks or does it have a pratical use? Also, I've never done any kind of electrical work before, so can some one tell me if the wiring required is easy to learn? I would hate to invest in a led kit and screw it up. What can I do to practice? Thanks!