Fog Light recommendation

[the evil twin]

snip... My BMW has factory fog lights and they are a 'projector style' and mounted down in the spolier/skirt - they are great lights however too low for the application. Its low speed stuff as well, so less than say 40km/hr at a guess, fogging mountain driving - if we ever get released from isolation!

If the application is 'low speed driving in fog' then you want the lights as low as possible.

The issue with fog is the reflected light from the droplets 'whiting out' the drivers vision
Fog doesn't usually go all the way to the ground, there is almost always a small layer of much clearer air about 12 to 18 inches or so above the ground.
The lower the light position the more penetration and less reflection in this boundary layer.
The most efficient penetration is white but that is also the worst colour for the human eye when reflected back which is why old school foggies were filtered well into yellow.
The illumination from a yellow source was not as efficient but much less annoying so gave the illusion of being better to the naked eye than white.

Sooo... ideally foggies should be as low as practical, beam as wide and flat as possible and colour should be warm and not ultra white so, as MB TD42 says mid 2's low 3's kelvin.
Makes them more vulnerable off road tho and most big 4Xs the "lowest practical mounting" is often more than 18 inches off the deck.

Fog isn't a big issue over here in WA but in NSW I used to use el cheapo 3 inch generic lights, low as possible and tape the lens with clear tape.
When I broke one I would just chuck it