With all the lighting i have on my car I ran the toggle switch right off the battery, using both the positive and the ground. I would recomand putting an inline fuse in as close to the battery as you can get it, just like witha stereo. Make sure you get a a switch that is heavy enough to handle the power and I would at least use 18 gauge wire to run it. I put all my toggles in the center consel next to the e brake for easy access.