The Ford F4 high beam and low beam headlight bulbs both utilize the H6006 size. The replacement chart covers 1950 to 1952 production years with corresponding bulb specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Ford F4 uses the H6006 bulb size across both the high beam and low beam headlight positions for the 1950-1952 model years.
The H6006 is an ANSI-standard sealed beam unit recognized in both the United States and Canada, operating at 12 volts.
Sealed beam units such as the H6006 house the filament, reflector, and lens within a single fused glass assembly, meaning the entire unit is replaced rather than an internal bulb.
The H6006 follows a 5x7-inch rectangular form factor, which is a standardized size shared across many vehicle applications of that era, making cross-brand fitment possible in some cases.
Because the Ford F4 uses the same H6006 unit for both high and low beam functions, the headlight assembly relies on the sealed beam itself to produce both light outputs, typically through dual filaments within the unit.