which is better yellow or white fog bulb?

[haroldhulbert91]

White, Its gives an attractive look as well and good result.

[travajante]

The typical color of a foggy condition is white, using yellow tinged light offers CONTRAST which is good for a low visibility scenario

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+1

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[dr. d]

if you want performance, i.e., cutting thru the rain and fog/smoke, go yellow.
it's on page one of this thread.

[oj88]

It doesn't have to be pure yellow. Warm colors between 2700-4100 Kelvin, give or take, can be used for fog lamps.

Any lower and you lose lumens as the light starts shifting to orange.

Any higher and the added blue light starts becoming a problem. Blue light will easily scatter in the atmosphere, including fog, dust, mist, rain, road debris, etc. So instead of seeing more of the road, you see more of the fog and every speck of flying debris. That's why the sky is blue.

[babkalakal]

White, Its gives an attractive look as well and good result.

uhmmmmm.. okay

[dr. d]

White, Its gives an attractive look as well and good result.

...until you get to drive in the fog.
heh heh.