Question: Yellow Fog Lights
Why not purchase yellow halogens? They are fairly inexpensive and should do the trick.
You can definitely get away with using HID's in the fogs, but without the correct projector lens, I would stick with Halogens and save a few bucks.

Nokya Arctic Yellow H7 Headlight Bulb (Stage 1) by Nokya
Nokya Arctic Yellow H7 Headlight Bulb (Stage 1) by Nokya Nokya Arctic Yellow H7 Headlight Bulb (Stage 1) : Amazon.com : Automotive










