The Husqvarna TE150 uses HS1 bulb size for both high beam and low beam headlight applications. The replacement chart covers 2017 through 2022 model 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 HS1 bulb is the sole bulb type specified for the Husqvarna TE150 across all listed model years and positions, covering both high beam and low beam headlight functions from 2017-2022.
The HS1 is a dual-filament halogen bulb, meaning a single unit contains separate filaments for both high and low beam operation, which is why it serves both headlight positions in this application.
The HS1 operates at 12 volts with a 35W/35W output rating, where each wattage figure corresponds to one of the two filaments, high beam and low beam respectively.
The HS1 uses a PX43t base, a bayonet-style fitting with a 43mm collar that is specific to motorcycle headlight applications and is not interchangeable with common automotive bulb bases such as H4.
The HS1 is governed by ECE (Economic Commission for Europe) standards, a regulatory framework recognized across Europe and numerous other markets worldwide, which defines the bulb's photometric and dimensional requirements.
Although the H4 bulb shares a similar dual-filament halogen design and 12V/60W-55W rating, it uses a P43t base rather than the PX43t base of the HS1, making the two types physically distinct and not directly interchangeable in the Husqvarna TE150 (2017-2022) headlight housing.