Very easy to do it once found the wire in the dome light that will have power when the door opens and tap on it, just need to hide the wires to the foot wells. I've done that for 2 cars. The first one used CCFL tube, the voltage inverter has potential high voltage risk. The second one used LED strip, very straight forward, no inverter required. You might consider to get a roll of 5m so you can do other projects. I have it under my sofa too.