Honda Motorcycle GL1500CF Valkyrie Interstate tail light bulbs consist of a 24 size inner bulb and 7443 size outer bulb. The replacement chart covers 1999 to 2001 model 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 Honda Motorcycle GL1500CF Valkyrie Interstate uses two distinct bulb types across its tail light assembly for the 1999-2001 model years: the 24 for the inner tail light and the 7443 for the outer tail light.
The 24 bulb is an ANSI-standard single-filament type rated at 12V and 2W, fitted with a BA9s base, which is a small bayonet-style cap commonly associated with low-output indicator and marker lighting applications.
The 7443 bulb is an ANSI-standard dual-filament wedge type in the T20 form factor, rated at 12V with a 21W/5W output, where the higher wattage filament typically serves the brake light function and the lower wattage filament serves the running light function.
Both the 24 and the 7443 are designated as ANSI standards applicable to the US and Canadian markets, indicating these are region-specific fitments rather than universal global specifications.
The significant wattage difference between the two bulb types, 2W for the inner and 21W/5W for the outer, reflects a functional distinction: the inner tail light operates as a low-draw marker or accent light, while the outer tail light carries the primary brake and running light duties.
The BA9s base of the 24 bulb is not interchangeable with the wedge-style base of the 7443, as the two types use entirely different mounting and contact systems within their respective sockets.
The dual-filament design of the 7443 means the socket wiring for the outer tail light carries two separate circuits, and substituting a single-filament wedge bulb in that position would result in the loss of one lighting function.