When I was working on my baby Dodge today I looked at the headlights, and now it is overcast it is better to see inside. It looks like it is a H4 or H7 light bulb inside, I mean with that typical black cap on with the little tip. So, I guess that mean it is a halogen light. But, it is still fairly yellow light, so I guess I have to look at the voltage that comes to the lamp.