You will never get an exact match when you put HID bulbs in the fogs. I know that my X5 headlights have a blue hue to it (though stock) and I put in phillips 4300k and they were too white looking.... I tried several other temps but I couldn't get a perfect match. The reason for this is the projector in the headlights has it's own color glass. Also, I found that the output of light was very distorted because the fog-light housing is not a projector-style housing..... but it's a good deal!! That's like half what I paid!!

here tons of HID under $100
http://stores.ebay.com/buyhid2007

There are a lot of HID kits out there for under $100 but they are not true xenon bulbs. They have a lot of fillers in them, making the color. Phillips and prolumen are two brands that have a pure xenon color, without the extra fillers. Also, they have strong capsules and are known to last. So beware of those Asian HID's!!

thanks for the info, this guy has sold tons of these prolumen kits and is the lighting forum sponser at bimmerforums.