Suzuki Motorcycle LT-F300F KingQuad 4x4 Tail Light Bulb Size

The Suzuki Motorcycle LT-F300F KingQuad 4x4 tail light requires a bulb size of 12821 for the rear lighting assembly. Available data for the specified component covers the range from 1999 through 2002.

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 Type	Shop
1999-2002	12821	Check Price

Bulb Specifications

Description	Type	Shop
Philips part number. Miniature wedge bulb (T10) with W2.1x9.5d base. 12V, 5W.	12821	Check Price

Other Locations

Additional Notes

The Suzuki LT-F300F KingQuad 4x4 uses the 12821 bulb for the tail light position across the 1999-2002 model years.
The 12821 is a Philips part number designating a miniature wedge bulb in the T10 form factor with a W2.1x9.5d base.
The T10 designation refers to a tubular bulb body approximately 10mm wide, commonly used in low-intensity automotive lighting positions such as tail lights and parking lights.
The W2.1x9.5d base is a wedge-type base, meaning the bulb is held in its socket by the tension of the glass envelope itself rather than by a separate metal cap or bayonet fitting.
The electrical rating of the 12821 is 12 volts and 5 watts, placing it in the low-wattage category typical of indicator and tail light applications rather than primary illumination functions.
Because the 12821 uses a wedge base, it is not interchangeable with bulbs that use bayonet or screw-type bases, even when voltage and wattage ratings are otherwise identical.