Your question was so closely related to the original post that I would hardly call it a hijack. Lots of people have purchased second-hand cars with modified headlights, and just might need to see your question.

I also don't know how to tell if you have retrofit bulbs. I have only seen the OEM halogen lamps in person. They work very well on my car, giving me really no desire to change them. Well, change them again. I bought a pair removed from Ernesto's (BENZ-LGB) car when he installed HID's. Mine were cloudy, his were crystal clear and the right price.