2002 Ford Focus - Need help with headlight bulb-replacement.

I recently bought a 2002 Ford Focus, and am looking to change the headlights to Xenon white lights. The only thing is, I don't know which kind of bulb I need. The owners manual says the headlamp trade number is "HB2" but I'm clueless on what that tells me in chosing the correct xenon bulbs.

https://www.streetglow.com/cgi-local/shop.pl/SID=109565742328685/adcode=/page=hid.htm

Can someone look at that page and tell me which I'd need?

Thanks guys.

I just went through the EXACT same thing with the '01 Focus I bought a month ago. I don't know why it says "HB2" in the book, but a H4 or 9003 (same as H4) is what it takes.