Ford F-350 Headlight Bulb Size

Additional Notes

• The H6024 is the most frequently specified bulb type across the Ford F-350 headlight data, covering both high and low beam positions across a wide span of model years. It is a 7-inch round sealed beam unit operating at 12V, conforming to the ANSI standard for the US and Canadian markets. As a sealed beam design, the entire unit is replaced rather than an internal bulb.
• The 9007 bulb is a dual-filament halogen type with a PX29t base, rated at 12V with 65W on high beam and 55W on low beam. A single 9007 unit serves both the high and low beam functions on the Ford F-350 for the 1992-1997 model years, which distinguishes it from sealed beam predecessors that used separate or integrated fixed-output units.
• The 9004 bulb shares the dual-filament halogen design of the 9007 but uses a P29t base and carries a lower low-beam wattage of 45W versus 55W. It was specified for both high and low beam positions on the F-350 for the 1987-1991 model years. The 9004 and 9007 use different base types and are not interchangeable despite their similar dual-filament function.
• The H6054 and H6006 are both 5x7-inch rectangular sealed beam units operating at 12V under the ANSI standard. Although they share the same physical format, they are distinct part numbers and are not confirmed as interchangeable within these specifications. The H6054 was used on the F-350 from 1980-1986, while the H6006 was specified for 1953-1955.
• For the 1978 and 1979 model years, the Ford F-350 carried two distinct headlamp configurations: a 2-rectangular-headlamp setup using the H6054 sealed beam unit, and a 2-round-headlamp setup using the H6024 unit. These configurations require different replacement units and are not interchangeable with one another.
• The H5001 is a 4-inch square sealed beam unit specified for the high beam position on the F-350 for 1958-1960, while the H5006, a 5.75-inch round sealed beam unit, was used in the low beam position for those same years. The two units differ in both shape and size, reflecting a split-function sealed beam arrangement for that period.
• All sealed beam types listed in the specifications, including the H6024, H6054, H6006, H5001, and H5006, operate on a 12V system and conform to ANSI standards applicable to the US and Canadian markets. Because the reflector, lens, and light source are fused into a single unit in sealed beam designs, damage to any part of the assembly requires full unit replacement.
• The transition from sealed beam units to replaceable halogen bulbs on the Ford F-350 is reflected in the shift from the H6054 sealed beam in 1986 to the 9004 halogen bulb in 1987. The 9004 and the later 9007 use a socketed base that allows the halogen capsule to be replaced independently of the headlamp housing, a fundamental structural difference from all sealed beam types in the specifications.