Ah well, it didn't stop the Nazis invasion, did it? I've been told (whether it is true or not is another thing) that the Germans forced the French to adopt yellow headlamp bulbs in order to allow checkpoints to know it was a French citizen approaching, rather than one of the occupying forces. If that was the case, then how come Belgium, Holland, Poland, Czechoslovakia, Denmark and Norway didn't? I think it was a French law from well before WW2. By the 1990's EU laws forbid the use of yellow bulbs, so France fell into line with the rest of the world.

In 1997 I saw some older cars with yellow headlamps in France. Like pre 1990s. Another story was the yellow produced less glare to oncoming drivers. Or we're better when driving through fog.

I have yellow tungsten filament bulbs fitted to my 2CV. Clear glass bulbs just don't look right. People claim you can't see the road at night with yellow bulbs fitted. I've never had an issue.

It's the opposite.
Here's why the French used yellow headlamps:
http://bimmertips.com/origin-yellow-french-headlights/

Well that article in the link has pretty much proven I'm right on all points.

I read some very technical article somewhere that said the yellow light in fog thing was proven to be not right. I do like the look a lot though and I'm tempted to try it.

yellow lights are great in fog they don't reflect as much as the white ones...

OK that explains why I still saw some cars in France with yellow headlights.

Back in the 80s as a teenager my first car was a 1981 Honda Prelude. I had some yellow fog lights on that car but can't remember if they really worked all that great in fog.

Good running car but made of horrible recycled steel and the many didn't survive road salt and rainy climates. Most of the ones still on the road are in Southern California (as of a few years back).





Sealed beam headlight timeline on US spec cars:

https://www.carid.com/articles/brief-hi ... in-us.html