Buell XB9S Lightning License Plate Bulb Size

The Buell XB9S Lightning uses a 12961 bulb size for the license plate assembly. The replacement chart covers 2003 to 2004 vehicle production years with corresponding bulb specifications.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	Bulb Size
2003-2004	12961

Bulb Specifications

Description	Bulb Size
Philips part number. Miniature wedge bulb (T10) with W2.1x9.5d base. 12V, 5W.	12961

Other Locations

Additional Notes

The 12961 is the specified license plate bulb for the Buell XB9S Lightning across the 2003-2004 model years.
The 12961 designation is a Philips part number for a miniature wedge-type bulb.
This bulb follows the T10 form factor, a small tubular glass envelope commonly used in low-intensity automotive lighting positions such as license plate and courtesy lamps.
The base type is W2.1x9.5d, a wedge base that relies on the tension of the socket contacts rather than a bayonet or screw mechanism to maintain its connection.
The bulb operates at 12 volts and draws 5 watts, placing it in the low-wattage range typical of auxiliary and marker lighting applications.
The W2.1x9.5d base designation is standardized, meaning physical fitment depends on matching both the wedge width of 2.1mm and the pin spacing of 9.5mm to the socket.