Yellow Fog lights?

[GTO]

Today I had a conversation about fog lights.
I was told that yellow fog lights provide better visablity (better peneration) of fog.
i figured that since yellow light is higher wavelenght (lower energy), since white light has the entire UV-VIS spectrum is it less prone to "Rayleigh scattering" of solid particles of fog.

Wonder is this is true and if not what are the best fog lights for a WRX. Stock are good but better is well better. Its simply a matter of changing the bulbs.