First of all, GO WITH PIAA. Visit PIAA.com and buy them from ABT electronics, autotoys.com and various other vendors. Secondly, Fog lights can be any color - not just yellow. Supposedly the yellow color does better at penetrating the fog, but I don't think it really matters. I'd say look at PIAA.com and they show different types of fog and driving lights along with the distance and angles for which the different fog lights project.