Hiyall !

Since there has been some discussions lately about the use of / difference between driving and foglights I suggest that if you really would like to see the difference for yourself, go to the Hella site at
http://www.hella.com/  click "light tunnel" and start playing !
This IS an advertising page for Hella but it's still worth looking at when you�re curious !
On my Vanagon I have the Rounded H4 60/55 w setup and has added two foglights with yellowish bulbs ( nice in snow/fog and not interfering too much with my far distance vision ) and two drivinglights with bright white bulbs, all H2 / 55W to save both electricity AND reflectors.
With two swiches I could choose the fog only when foggy or snowing, driving only when on highway and all four when driving backroads ! 
Works perfect IMHO

Calle
-88 Vanagon
Mullhyttan, Sweden