I did a mod to my prius (for the kids) they call Cash Cab. Walmart parts Under $50. I put 4 ten in light bars in the foot wells and flexible leds in the lights in the ceiling. one extra 10 in in the back. They use the power from the 12 v so the lights go off when the car does, and they are hooked up to a light switch. http://priuschat.com/forums/album.php?albumid=123 Check out my album for Picts