I'm not really sure what they're called. On the mustang I had I changed the headlights out completely. They were old and yellowed so I replaced them with the clear marker ones and they were a bit brighter. Then later on my husband got some replacement bulbs for them, along with some fog lights for me and I was happy with that. Basically even brighter replacement bulbs for this one will work as long as I can see better at night. I'm always afraid of hitting a deer on my way home from work because the light span isn't wide enough unless I have my bright lights on. You'd think there'd be no traffic at midnight, but there is so I can't always run my brights. So recommend anything to me if you wish, but keep in mind I'm not a big fan of the ones that burn blue.