The Buell XB9SX Lightning uses H7 bulb size for both high beam and low beam headlight applications. The replacement chart covers vehicle production years spanning 2005 to 2010.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Buell XB9SX Lightning uses the H7 bulb for both high beam and low beam headlight positions across the 2005-2010 model years.
The H7 is a single-filament halogen bulb, meaning each headlight function requires a dedicated bulb rather than sharing one dual-filament unit between both beam modes.
H7 bulbs operate at 12 volts and consume 55 watts, which are standard ratings for halogen headlight applications.
The H7 uses a PX26d base, a two-pin connector with a specific locking tab orientation that is not interchangeable with other common bases such as H4 or H11.
The H7 is an ECE-standard bulb, meaning it was developed under European regulations and is also approved for use in the United States and Japan.
Because the same H7 specification applies to both beam positions, the physical bulb used in the high beam socket and the one used in the low beam socket are identical in type and rating.