This site explains everything you ever wanted to know about bulbs! (and conversions, wiring, relays, blue bulbs, etc)

http://lighting.mbz.org/tech/info/bulb_types/

It says that HB2, 9003, and H4 are essentially the same, that the HB2 is an H4 "built to tighter tolerances". Hope this helps.



[Edited by JCE on 01-23-2001 at 11:57 PM]

__________________
John

2003 Firemist Red/grey leather SL 500
2015 Palladium Silver/black mbtex GLK 350
1987 Smoke Silver/burgundy mbtex 300E Sportline (SOLD)

Click to see 87 300E