The Ducati GT1000 headlight bulb uses a 9003 size for both high beam and low beam functions. The replacement chart covers 2007 to 2010 production 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 bulb type is specified for both the high beam and low beam headlight positions across all listed model years of the Ducati GT1000, covering the 2007-2010 range.
The 9003 bulb is a dual-filament halogen type that operates at 12 volts and carries a rated output of 60 watts on the high beam filament and 55 watts on the low beam filament, allowing a single bulb to serve both lighting functions.
Because the Ducati GT1000 uses the 9003 specification for both the high beam and low beam headlight positions, a single bulb design handles both functions within one housing rather than requiring separate bulbs for each beam mode.
The 9003 bulb is electrically and physically interchangeable with the HB2 and H4 designations, which are alternative names for the same bulb standard used in different markets and by different manufacturers.
The consistent use of the 9003 specification across all four model years from 2007 to 2010 indicates no mid-cycle change to the headlight bulb fitment during that production period.
The 9003 and H4 designations refer to the same physical bulb, but replacement packaging may carry either label depending on the manufacturer's regional market, which is a relevant consideration when sourcing a replacement unit.
The P43t base type is the standard connector used on 9003 and H4 bulbs, and this base must match the socket in the headlight housing for proper fitment.
Substituting a single-filament bulb in place of the dual-filament 9003 would not satisfy both the high beam and low beam functions simultaneously, making filament count a critical factor in replacement selection.