Mark,

> If yellow fog lights are so much better, then why do manufacturers even offer
> fog lights with clear lenses?

I really haven't a clue why they do what they do.

One possible reason may be political. In standardizing lenses throughout Europe,
the French "yellow" was dropped in favor of the more common "clear".

I had both; "clear" on the Vanagon and "yellow" on the Saab. IMO The "yellow"
lenses are better for driving through fog. They were both Cibie's and had similar
lenses and were about the same height above the road.

Alas, the Saab is sold but I kept the yellow driving lights to use another day.
The Vanagon currently has Super Bi Oscars with enough candle power to bleach a
moose.

Larry