Absolutely love MotorFiend and their HID kits.
Users should keep the color/temp around the 4300K mark for Headlights and lower for Driving/Fog lamps. No one knows any different.
Eric you can always hook up a separate relay for the fog light system to arm the system with the ignition in the on position.
I do that with my aftermarket heated windshield wiper/washer system.