The Triumph TR8 uses H6024 bulb size for both high beam and low beam headlight applications. Replacement chart data covers 1980 to 1981 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 H6024 is the sole bulb type specified across all listed headlight positions and model years for the Triumph TR8, covering both high beam and low beam functions for 1980-1981.
The H6024 is a 7-inch round sealed beam unit operating at 12 volts. Unlike bulb-based headlights, a sealed beam integrates the filament, reflector, and lens into a single glass envelope, meaning the entire unit is replaced rather than an internal bulb.
The H6024 conforms to ANSI standards and is approved for use in the United States and Canada, indicating it meets the photometric and dimensional requirements set by North American regulatory bodies for road use.
Because the Triumph TR8 uses the same H6024 unit for both high beam and low beam positions, the sealed beam itself contains dual filaments, with each filament serving a separate lighting function within one housing.
The identical H6024 fitment across both the 1980 and 1981 model years indicates that no headlight specification change occurred between those two years, and the same replacement unit is applicable to both.