The Rolls-Royce Silver Shadow II uses an H5001 bulb size for high beam headlights and an H5006 bulb size for low beam headlights. The replacement chart covers vehicle production spanning 1977 to 1980 with corresponding bulb size specifications.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Rolls-Royce Silver Shadow II used two distinct sealed beam units across its 1977-1980 model years: the H5001 for high beam and the H5006 for low beam.
The H5001 is a 4-inch square sealed beam unit operating at 12V, conforming to ANSI standards applicable in the United States and Canada.
The H5006 is a 5.75-inch round sealed beam unit, also rated at 12V and built to the same ANSI standards as the H5001.
Both the H5001 and H5006 are sealed beam units, meaning the lens, reflector, and filament are fused into a single assembly. When the filament fails, the entire unit requires replacement rather than an internal bulb swap.
The square profile of the H5001 and the round profile of the H5006 make the two units physically incompatible with each other, and one cannot substitute for the other in either headlight position.
The ANSI designation on both units indicates they conform to a standardized specification governing electrical and physical characteristics, which means equivalent units from different manufacturers sharing the same ANSI code are generally interchangeable.
The consistent use of H5001 and H5006 across all four model years indicates no mid-production change in headlight specification occurred during the Silver Shadow II's production run as represented in these records.