A good alternative to the stock bulb is the "Xenon BriteLite" from the NAPA parts store for a headlight that is much brighter than stock. NAPA will probably have to order it for you (part number BP1260/H4BL), but it is a direct replacement for the stock H-4 bulb.

The Sealed Beam Headlight on the '02 Fat Boy is just dim - no other word for it. Replace it with the same set up used in the rest of the Harleys - an H-4 bulb and reflector - cheap! JC Whitney sells item number "13zx9314a, H4 Halogen Headlight, Round MC" for $16.95, this kit includes the H-4 bulb, rubber boot to seal the bulb and the reflector. It is plug and play, remove the sealed beam light and install this kit.

 

Do you know if the Adjure 7" headlight with the H4 bulb would be a simple replacement for my stock 02' fatboy headlight? The stock headlight sucks.

Thanks