or sidelights, whatever you wish call them. Too many people drive with sidelights on and presume you can see them similar to dimmed headlights. One purpose of lights is so others can see you. People rarely use these dim lights for parking, there is a case for only having headlights,dimmed or main beam - properly adjusted of course. I have just narrowly missed a car with sidelights on in a dark country lane........maybe the driver was trying to hide. Rant over......
"Years ago we all had yellow fog lights. Very uncommon now I think.
No we didn't, only in France."
Years ago FOG lights were often yellow. The French had yellow HEADLIGHTS but were forced to come in line with the rest of the EC and change to white.
I think eikonuj was referring to driving on headlights not parking. There should be no problem with this, the battery doesn't come into the equation with modern alternators, unlike when we had dynamos when the battery could suffer.