The Rolls-Royce Silver Wraith II uses H5001 bulb size for high beam headlights and 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 Wraith II used the H5001 bulb type for high beam headlights across all four model years from 1977-1980.
The H5001 is an ANSI-standardized sealed beam unit, 4 inches square, operating at 12 volts. The entire unit is replaced rather than an internal filament or capsule.
Low beam headlights on the Silver Wraith II used the H5006 across the same 1977-1980 model year span.
The H5006 is also an ANSI-standardized sealed beam unit operating at 12 volts, distinguished from the H5001 by its 5.75-inch round form factor rather than a square one.
Both the H5001 and H5006 conform to ANSI standards applicable in the United States and Canada, meaning their physical and electrical specifications are governed by a common North American standardization body.
Because both types are sealed beam units, the lens, reflector, and filament are fused into a single assembly. Damage to any one of those elements requires replacement of the whole unit.
The H5001 and H5006 are not interchangeable with each other. Their differing shapes and functions, square for high beam and round for low beam, correspond to separate housing positions on the vehicle.