Mercury Park Lane high beam headlight bulbs measure H5001 in size, while low beam headlight bulbs measure H5006, with each bulb size corresponding to specific lighting functions on the vehicle. The replacement chart covers 1958 to 1968 model years and details bulb size specifications across the entire production range.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Mercury Park Lane uses the H5001 bulb type for high beam headlights across all listed model years from 1958-1968, with a gap in coverage between 1960 and 1964.
The H5001 is a 4-inch square sealed beam unit operating at 12 volts, conforming to ANSI standards recognized in both the United States and Canada.
Low beam headlights on the Park Lane use the H5006 across the same model years, a 5.75-inch round sealed beam unit also rated at 12 volts and built to the same ANSI standard.
Both the H5001 and H5006 are sealed beam units, meaning the lens, reflector, and filament are fused into a single assembly. When a filament fails, the entire unit requires replacement rather than an internal bulb swap.
The H5001 and H5006 are not interchangeable with each other. The two units differ in shape and physical size, with the high beam unit being square and the low beam unit being round.
Because both bulb types follow ANSI standards, replacement units from any manufacturer conforming to those specifications are considered compatible with the Park Lane's headlight housings.