Might want to read this before you get into real HIDS (if that is what you are talking about.) This is a good article anyways about lighting. You will want to retrofit your headlights or the glare will be so bad for on comming motorists.. that it will blind them.
http://www.intellexual.net/hid.html
If you are just talking about blue bulbs.. they burn out fast and arnt really worth it. Get Silver Stars if all else.
http://www.intellexual.net/hid.html
If you are just talking about blue bulbs.. they burn out fast and arnt really worth it. Get Silver Stars if all else.