Ski-Doo Summit Sport 600 Carb Tail Light Bulb Size

The Ski-Doo Summit Sport 600 Carb tail light utilizes a P21/5W bulb size for the rear lighting component. Available data covers the production span from 2012 through 2019.

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
2012-2019	P21/5W

Bulb Specifications

Description	Bulb Size
ECE standard (Europe & worldwide). Dual-filament signalling bulb with BAY15d bayonet base. 12V, 21W/5W.	P21/5W

Other Locations

Additional Notes

The Ski-Doo Summit Sport 600 Carb uses the P21/5W bulb across all listed model years from 2012-2019, making it the sole tail light bulb type represented in these specifications.
The P21/5W is a dual-filament bulb, meaning it contains two separate filaments within a single glass envelope. The higher 21W filament typically serves the brake light function, while the lower 5W filament handles the running light function.
The P21/5W operates on a 12V electrical system, which is standard across most powersports and automotive lighting applications.
This bulb uses a BAY15d bayonet base. The BAY15d designation indicates an offset pin configuration, where the two pins are positioned at different heights on the base. This offset prevents the bulb from being inserted in the wrong orientation, ensuring the correct filament aligns with each circuit.
The P21/5W is governed by ECE (Economic Commission for Europe) standards, a regulatory framework recognized across Europe and numerous other markets worldwide.
Because the BAY15d base uses asymmetric pin placement, it is not interchangeable with the BA15d base, which features pins at equal heights. Substituting a BA15d bulb in a BAY15d socket is not possible without modification.