[locutous]

In many cars fog lights and high beams are mutually exclusive. You can't turn on both even if you wanted to.

[valleyer]

Thanks, that of course makes intuitive sense. I suppose I'm simply noticing (like other people in this thread) that their low beams seem way bright (and that their fog lamps are on), and I never thought it through.

(In any case, a lot of people around me very clearly have their fog lamps on in non-foggy conditions, which I don't understand.)