Headlight Bulb Suggestions
 

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.