I recently purchased some LED rope light from lowes in hope to wire it into my bed. I read some of the DIY's but I was hoping to be able to use the lights with the vehicle completely off, via a switch in one of the rear cubbies. Could i tap power from one of the tail lights? The rope lights are designed for home use, so my first thought was to wire them into the AC outlet in the rear but that only runs when idling. I (clearly) know little about electronics and would appreciate help.