Yep standard H3 bulb any auto store or tractor supply store will have them even Walmart carries them.
I would suggest going with one of the PIIA bulbs, I went with the 55watt (it's supposedly equal to 100watt) and it's light output was DREMATICALLY improved and much witter of a light. They do not seem to last as long and are pricey but they sure do work good. Just make sure you dont get any finger prints or other body oils on them they will over heat and burn out very quickly.
H3 SERIES INTENSE WHITE is the one I used. Shop ebay for them or 4x4 websites are another good choice to find them.
http://www.piaa.com/Bulbs/Bulbs-H3.html