The Freightliner FL80 uses H6054 bulb size for both high beam and low beam headlight applications. The replacement chart covers vehicle production spanning 1991 to 2005.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Freightliner FL80 uses the H6054 bulb type for both high beam and low beam headlights across all model years from 1991 to 2005.
The H6054 is a sealed beam unit, meaning the bulb and lens are housed together as a single assembly rather than as a replaceable bulb within a separate housing.
Sealed beam units such as the H6054 operate on a halogen gas fill, which allows the filament to burn at a higher temperature and produce a whiter, brighter output compared to older vacuum-filled sealed beams.
The H6054 is a rectangular sealed beam format, a form factor widely standardized across North American commercial and heavy-duty vehicle applications.
Because the Freightliner FL80 uses the same H6054 specification for both the high beam and low beam functions, the unit is a dual-filament sealed beam, with one filament dedicated to each lighting mode.
The uninterrupted use of the H6054 across the entire 1991-2005 production span of the FL80 indicates a consistent headlight housing design with no generation changes that would affect bulb fitment.
The H6054 shares its rectangular housing format with the related 6054 bulb, though the "H" prefix specifically designates the halogen-filled variant, and the two are not always interchangeable depending on socket and retainer ring configuration.
Aftermarket H6054 sealed beams are widely produced by multiple manufacturers, and wattage output can vary between standard and high-output versions, which may affect compliance with vehicle lighting regulations.