The Harley-Davidson XL1200N Sportster 1200 Nightster uses a 9003 bulb size for both high beam and low beam headlight applications. The replacement chart covers 2007 through 2012 model years with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 9003 is a dual-filament halogen bulb, meaning a single unit contains two separate filaments: one rated at 60W for high beam operation and one rated at 55W for low beam operation.
The 9003 uses a P43t base, which is a three-pronged bayonet-style mount. This base type is standardized and determines physical fitment into the headlight housing.
The bulb operates on a 12V electrical system, consistent with standard motorcycle electrical architecture.
The Harley-Davidson XL1200N Sportster 1200 Nightster uses the 9003 bulb for both the high beam and low beam headlight positions across the 2007-2012 model years.
Because both beam positions share the same 9003 bulb, a single bulb type serves the entire headlight assembly rather than requiring separate bulbs for each function.
The 9003 designation is an ANSI standard recognized in the United States and Canada. It is functionally equivalent to the international HB2 designation, and bulbs sold under either designation are generally interchangeable.