I think my head lights are getting dimmer on my 93 100S. I was wondering if there were any other alternatives that I could replace it with other than stock OEM bulbs. Brighter would be better. . .but not obtrusive to other traffic. A friend of mine mentioned H4 bulbs. What are they? Is it available for Audi's? Any help would be appreciated. Seung Lee 93 100S Lanham, Md