head lights ( angel eyes )

ok can someone please help me any information would help i want to put angel eyes i found a nice pair, but questions is this if i buy the angel eyes what else do i need to replace one i get the housing do i have to get some kind of head light bulbs or what i dont know how they work can someone please explain to me thank you . email me if you want ( w8tng4nepiphany@aol.com )
 
 
thanks again 1!!!