Shovelhead said- he "doesnt need them during the day", and of course he's right but I've found a good, visible set of backup lights do a lot to warn others in the grocery store parking lot that you intend to back up. Some of these folks are just barely paying attention. Also when I'm in pedestrian mode, its helpfull to see who is in reverse & who's not. I cant see out the back of my truck so the mirrors are my only view to the rear and I need all the help I can get in clearing a path for backing up... . JTMcC.