Generally speaking, brighter lights (higher Kelvin) produce more glare in the conditions where glare would least benefit you. For most people, fog lights simply affect the aesthetics of the car and change the light pattern as seen from front, but little else. Popping in lights rated at 6,000K might look "flashy" in a show-car but in real world applications, running 6,000K foglights in actual foggy/snowy conditions will result in a whiteout and actually hurt your vision. Instead of illuminating the road, the super-bright light actually reflects off the millions of vapor particles and obscures vision.

The lower Kelvin rating of yellow fogs (3,000K) allows visibility w/o the glare... which is the point of having foglights on in the first place. Living in Tennessee, fog is a major deal with all of our valleys, lakes, and streams. Any low-light situation absent of fog would simply warrant the use of low-beams in the headlight assembly... Any additional lighting is basically overkill.

If your preference leans towards form following function, then the yellow fogs are a match made in heaven with your styling tastes. Folks that hate yellow generally forego them for brighter lights, but at the expense of ultimate visibility in the conditions where you genuinely need them.

Different strokes...