Polaris Starlite Brake Bulb Size

The Polaris Starlite brake light utilizes 921 and 90 bulb sizes for the lighting components. Data for the specific bulbs covers the period from 1991 through 1995.

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
1993-1995	921
1991-1992	90

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Wedge bulb (T15). 12V, 16W.	921
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 13W.	90

Other Locations

Additional Notes

The Polaris Starlite uses two distinct brake bulb types across its 1991-1995 model years: the 921 and the 90, both conforming to ANSI standards recognized in the United States and Canada.
The 921 bulb is a T15 wedge-type unit operating at 12 volts and 16 watts. The wedge base design means the bulb is held in place by the socket itself rather than by a separate locking mechanism, making it a self-retaining fitment.
The 90 bulb is a single-filament type with a BA15s bayonet base, operating at 12 volts and 13 watts. The BA15s designation indicates a single-contact bayonet cap with a 15mm base width, which is not interchangeable with dual-contact bayonet variants.
The Polaris Starlite (1993-1995) takes the 921 bulb for the brake light position, while the 1991-1992 model years use the 90 bulb instead.
The 921 and 90 bulbs differ in both base type and wattage. The 921 produces 16 watts versus the 90's 13 watts, and their physically incompatible bases mean one cannot be substituted for the other without modification to the socket.