neons are great. i did a bit of research on these myself, but never really came to a decision... given the price, and the lower heat they produce, they seem to be a far better alternative... seeing as they run off the 12v rail of a PC power supply, you can just hook em directly up to your car power supply... i tapped in to the cigarette lighter when i had my neons installed (just normal car ones) and they worked very well... im not sure about sound sensitivity, but im guessing they have some sort of microphone thing that changes the current with the sound it picks up...