[wmhjr]

I had fog lights on 4 separate brands and they all worked the same. The fog lights work only with the low beams. It makes me suspect is due to some federal regulation. Anyway, when you are in actual fog, the glare and reflections from heavy fog makes high beams less effective than low beams.

FTW. Driving lights help to supplement headlights in non-fog conditions. Sounds like the OP wants to use the fog lights as driving lights. Two different purposes. Doesn't mean it isn't a rational idea - but that's why manufacturers did this. It's also IIRC why you can't in most vehicles have the light switch in "Auto" and use fog lights.

 

[wmhjr]

Again, the reason is safety. They are advertised as fog lights - not driving lights. Honda (and other manufacturers) are trying to promote safety for people who don't understand that high beams actually reduce visibility in heavy fog. Therefore, for when the fog lights are intended to be used (they are not intended to "fill in"), Honda is trying to influence people to NOT use high beams. I understand that there are people who would like to use the lights as driving lights (even though the beam pattern is very different than that of driving lights). Just pointing out the "some reason" - which does have deliberate logic behind it. It's another example of "dumbing down" products in order to protect the general public, which may not understand.