Ducati Monster 1200 Headlight Bulb Size

Additional Notes

• The H1 bulb is a single-filament halogen type operating on a two-pin base, used exclusively for the high beam function in the Ducati Monster 1200 across the 2017-2020 model years.
• The H7 bulb is also a single-filament halogen type but uses a different two-pin PX26d base, and it serves the low beam function in the Monster 1200 for the same 2017-2020 period.
• Because the 2017-2020 Monster 1200 uses separate H1 and H7 bulbs for high and low beam respectively, the two positions are not interchangeable with each other despite both being single-filament halogen types.
• The 9003 bulb is a dual-filament halogen type that handles both high and low beam functions within a single housing, and the Monster 1200 relied on this configuration for the 2014-2016 model years.
• The 9003 standard is electrically and physically equivalent to the H4 designation used in many international markets, meaning bulbs sold under either designation are generally cross-compatible.
• The shift from a single 9003 dual-filament bulb to separate H1 and H7 single-filament bulbs between the 2016 and 2017 Monster 1200 indicates a change in headlight housing design, and bulbs from the earlier configuration are not compatible with the later one.
• All three bulb types present in these specifications, H1, H7, and 9003, operate at 12 volts and are standard halogen replacements widely available across automotive and powersports supply channels.