I can remember the days when fog lights on cars were practically orange and were very effective. These have now become a light yellow and are probably not as effective.
Xenons, it seems are not too effective in fog, but is anything apart from those vile orange fogs?
How does a Golf R driver cope in fog, I wonder? Maybe, just maybe, Halogens are not that bad in the broad scheme of things apart from being a bit yellow and not as bright.

It's good we don't get too much or any heavy fog in the London area.
I hope I am not playing devils advocate.