Hello Everybody,

I was reading up on Fog lights when I came across this link:

http://www.gi.alaska.edu/ScienceForum/ASF5/593.html

I dont know how far this is true. Can anyone tell me why this cannot be true? Just trying to learn... Thanks.

fog lights arent made to cut through fog, they are made to illuminate the road lines. Yellow = more contrast hence they work.

nothing penetrates fog, period so that part is true. The best you can use your fog lights for is try to find the road markers on the side. Hence why fogs have the very wide thin beams of light and are mounted low on the car

I thought that it wasn't that the yellow cut through the fog/ran/snow - but the yellow reduced the glare and the reflection from the aforementioned...therefore "allowing" you to see better...?

Confused... :doh: sorry... i think i am a little slow.. can anyone explain what all those means? thanks...

Fog is water condensation in the air. When you are driving through it, your headlights reflect off of all the little water droplets right back at you--causing a glare, and also causing you to not be able to see anything in front of your car.

Fog lights are mounted lower on the body of the car, because they light up more of the road directly in front of the car, as opposed to headlights, which throw light further out in front of the car.

Basic idea is, you want any light you're using to see by to go 'under' the fog in front of you.

Yellow is supposed to work better, because it does not refract as easily off the water droplets, and it is more visable to your eyes in contrast with the road.

Ideally, all cars with fogs would automatically shut off the headlights when the fogs are turned on--better visability--but something in the DMV/DOT codes prevents this. I don't know exactly why.