I use my 500 drivers for seeing the wildlife far enough ahead to avoid impact. They really do have the sharp pencil beam that will illuminate the road ahead, in most cases farther than you are able to see. I wired mine into the high beams, with the hella switch located in the accessory location on the dash to the left of the steering wheel (by the mirror adjuster). Great lamps for what they do, I just suffer in the fog, as I have no fog lamps. LRW