The following is a video powered by a product I designed called The Listening Car, now sold by Jameco. The video combines it with my Listening Tree and is controlled by an UNO. The combination can drive hundreds of watts of lights in response to sound in its vicinity. The video shows a home version of the system. I'll put the same kind of system in a car and make a video of it as soon as things warm up a little. In that system, the LED light strips will be mounted under the car:
The Listening Car is not limited to lights. It can also drive motors -- up to more than 1 horspower total whan all 4 device channels are used.
See The Listening Car here:http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_2199551_-1
And The Listening Tree here:http://www.jameco.com/webapp/wcs/stores/servlet/Product_10001_10001_2173714_-1
The following, "Some Ideas On Using The Listening Car" shows how the system used in the video was put together and presents other ideas about how to use the system, including connecting a system directly to amplifier outputs and using it with motors:http://www.jameco.com/Jameco/Products/ProdDS/2199551idea.pdf
Let me know if you have any questions or ideas.