Is there a musical answer to this? You are the sunshine of my life? Bright Eyes? Should this not be "below the line"?

Don't know about American cars, but more and more UK cars now have "daytime driving lights" (not headlights) just to make them more visible. and most motorcyclists drive with their lights on all the time, again to make sure they are seen by other drivers.

First encountered "daytime driving lights" in a hire car in Canada in 1992: the rationale given was that you could then see approaching vehicles a long way off on those interminable long straight roads.