relating to my post below about wanting to remove amber from my xenon headlights...

i have an '01 w/ xenons...ebay has for sale a headlight assembly with clear corners but it says that the ballasts and bulbs are not included...do i need the ballasts or can i use them from my current xenon's..i dont even know what ballasts are...i have brand new bulbs coming - can i buy ballasts cheap?

any suggestions

thanks everyone!!