any decent yellow H4 bulbs out there?

[HerrStig]

Then why was the yellow
Originally Posted By: UG_Passat
Originally Posted By: HerrStig
Originally Posted By: UG_Passat
Originally Posted By: getnpsi
I got some yellow stain glass paint and hit my plastic fogs 4 years ago and they still look decent. Remember fogs aren't for you to see better it's so others know you are coming.


properly designed, there are for you to see..,, in the fog... the fogs should be lighting up the lower sides of the road, so you know where the edges & lanes are.

French yellow... that's a different story
PROPER foglights have a pattern designed to light the road directly in front and to each side but not the FOG above. A yellow color for the light may or may not reduce the amount of reflected glare from fog, snow, and rain. (The French think so) (The yellow is actually what's left after the glare producing BLUE has been filtered OUT) The only benefit I can see is that most US drivers will understand that the yellow lights are FOG lights, and that you are NOT some jackwagon with his/her highbeams on.


Fog lights have evolved since... there is less focus on lighting up the road in front, more focus on lighting the sides.

French Yellow was NOT designed for fog lights in mind. It was for the French to easily differentiate French registered vehicles from other countries. The French stopped doing it, as the paint was carcinogenic.

In some forms of racing, yellow lighting is used to differentiate certain classes.

Unfortuntately, the new riceboy trend is driving with HID low beams and yellow high beams during the day time.
why, then, was the yellow used on "optional" lighting units such as fog lights. The science of filtering blue is quite well established. The yellow tint used to absorb blue is often IN the glass, not "paint".

 

[UG_Passat]

Quote:
why, then, was the yellow used on "optional" lighting units such as fog lights. The science of filtering blue is quite well established. The yellow tint used to absorb blue is often IN the glass, not "paint".


Yellow fog lights used to be popular, until the 90's. They were popular due to myths such as Rayleigh Scattering.

However, what is true is how the wave lengths interact with the eyes.

Today, you don't see french yellow fog lights anymore

 

[HerrStig]

Originally Posted By: UG_Passat
Quote:
why, then, was the yellow used on "optional" lighting units such as fog lights. The science of filtering blue is quite well established. The yellow tint used to absorb blue is often IN the glass, not "paint".


Yellow fog lights used to be popular, until the 90's. They were popular due to myths such as Rayleigh Scattering.

However, what is true is how the wave lengths interact with the eyes.

Today, you don't see french yellow fog lights anymore
They are still easy enough to find. I like the "military" thing though, (if the Germans were worried about invading France I'm sure they would come up with a few yellow lamps of their own.) Dan Stern has the entire story on yellow light, the French wanted to IMPROVE night vision while supporting their unusual idea to brand invaders with their white light. BTW, Stern still sells a number of Cibie lamps in "selective yellow". The simple fact is that blue light is very short in wavelength and not a good source to see with. Our less than perfect eye optics don't deal with it well.

 

[Gotch]

...yellow can help with contrasts but you still need a properly designed fog setup. I have clear fogs on my 2012 Si and they are very effective at cutting through the fog.

 

[rfeir]

It is a myth that fog lights cut through the fog. They are designed to light the near field an the outer edges so that you can see the lane markers, etc.

"Select yellow," the color of older properly designed fog lights, depended upon cadmium, a heavy metal, for its tint, and is no longer used for environmental reasons. Today's yellow bulbs are often coated and put out less light.