Ford F-100 Headlight Bulb Size

Additional Notes

• The H6024 is the most frequently specified bulb across the Ford F-100 headlight data, covering both high and low beam positions from 1961-1977, as well as 1956-1957. It is a 7-inch round sealed beam unit built to the ANSI standard for the US and Canadian markets, operating at 12V. Like all sealed beam types, the entire unit is replaced rather than an internal bulb.
• The H6054 is a 5x7-inch rectangular sealed beam unit, also ANSI-rated at 12V, and serves as the specified bulb for both high and low beam positions on the F-100 from 1980-1983. It shares the same physical format as the H6006 but carries a different ANSI designation, and the two are not interchangeable despite the similar rectangular form factor.
• The 1978-1979 Ford F-100 model years present a split fitment condition: vehicles equipped with two rectangular headlamps use the H6054, while those equipped with two round headlamps use the H6024. This distinction applies equally to both the high beam and low beam positions, making headlamp housing configuration a required reference point before sourcing a replacement unit.
• The H6006, specified for the F-100 from 1953-1955, is a 5x7-inch rectangular sealed beam unit operating at 12V under the ANSI standard. Although it shares the same physical shape as the H6054, the two carry distinct ANSI designations and are not listed as interchangeable within these specifications.
• The 1958-1960 F-100 model years use separate bulb designations for high and low beam functions. The high beam position calls for the H5001, a 4-inch square sealed beam unit, while the low beam position calls for the H5006, a 5.75-inch round sealed beam unit. Both operate at 12V and follow the ANSI standard.
• All bulb types listed across the Ford F-100 specifications are sealed beam units, meaning the reflector, lens, and filament are fused into a single assembly. Replacement involves removing and substituting the entire unit rather than accessing an internal component.
• The H5001 and H5006 are each specified only for the 1958-1960 F-100, with the H5001 assigned to the high beam and the H5006 to the low beam. Their physical formats differ from all other bulb types in the specifications, with the H5001 being square and the H5006 being round at 5.75 inches, making them non-interchangeable with the 7-inch H6024 units used in adjacent model years.
• Every bulb type in the Ford F-100 headlight specifications conforms to the ANSI sealed beam standard applicable to the US and Canadian markets, and all operate on a 12V electrical system regardless of the model year or headlamp configuration.