If you thought the video below was cool, then check Wonderland Christmas.com, lots of cool videos and information there (not by the guy who did the display in the video I linked, though he does have that video there as well) by a guy in the Dallas area… well… Corinth, Texas anyhow…
There is a company called Light-O-Rama who makes computer control boards and software to do this very thing.
The things you learn…
Edit to add:
Animated Lighting is another company that builds computer control boards for this kind of thing, LED lights and more and they have a nice selection of shows built by their customers.
There are other companies as well…
Seems when using a show in sync with music they use a small FM transmitter and you listen to it from your car.
