Mercury Cyclone License Plate Bulb Size

The Mercury Cyclone license plate light requires bulb size 97 or 1155 depending on the specific application. Data for the bulb sizes covers the range from 1964 to 1971.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	Bulb Size
1968-1971	97
1964-1967	1155

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Variant of 1156. 12V, 13W.	97
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Variant of 1156. 12V, 21W.	1155

Other Locations

Additional Notes

The Mercury Cyclone uses two distinct license plate bulb sizes across its 1964-1971 model years: the 97 and the 1155.
Both the 97 and 1155 are ANSI-standardized bulbs recognized in the US and Canada, and both share the BA15s single-contact bayonet base.
The BA15s base is a single-contact bayonet fitting, meaning the bulb is inserted and rotated to lock into place with one electrical contact at the base tip.
Both bulbs are single-filament types, which is typical for license plate lighting applications that require only a steady, non-switching light output.
Both the 97 and 1155 are classified as variants of the 1156 bulb, indicating a shared base design but differing electrical characteristics.
The 97 bulb operates at 12V and 13W, while the 1155 operates at 12V and 21W, making the 1155 a notably higher-wattage bulb despite the shared base type.
The Mercury Cyclone (1968-1971) uses the 97 bulb for its license plate position.
The 1155 bulb is specified for the Mercury Cyclone across the 1964-1967 model years.
Because the 97 and 1155 share the BA15s bayonet base, physical fitment between the two is possible, but the wattage difference of 8W means they are not electrically interchangeable without consequence to lighting output.