Cadillac Calais License Plate Bulb Size

The Cadillac Calais license plate light utilizes 67, 97, and 194 bulb sizes depending on the specific version of the vehicle. Data for the lighting components covers the period from 1965 through 1976.

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
1976	194
1975	97
1973-1974	194
1971-1972	97
1965-1970	67

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W.	194
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. Lower wattage variant of 1156. 12V, 8W.	67

Other Locations

Additional Notes

The Cadillac Calais license plate bulb specifications span model years 1965 through 1976, with three distinct bulb types appearing across that range: the 194, 97, and 67.
The bulb 67 is the most frequently specified type in these records, covering the Cadillac Calais from 1965 through 1970, a six-year span.
The 67 is an ANSI-standard single-filament bulb with a BA15s bayonet base, rated at 12V and 8W, and is classified as a lower wattage variant of the 1156 bulb family.
The 97 bulb shares the same BA15s bayonet base and 12V operating voltage as the 67 but draws significantly more power at 13W, making the two types electrically incompatible as direct substitutes despite their physical base similarity.
The 97 is specified for the Calais in 1971, 1972, and 1975, while the 194 is specified for 1973, 1974, and 1976, indicating that neither type held a consistent position across those years.
The 194 is a T10 miniature wedge bulb, which uses a wedge-style base rather than a bayonet fitting, making it physically incompatible with the sockets designed for the 97 or 67 bulbs.
At 3.78W, the 194 operates at a considerably lower wattage than both the 67 and the 97, reflecting its role as a low-current wedge-base lamp common in indicator and license plate applications.
All three bulb types in these specifications conform to ANSI standards recognized in both the United States and Canada.
The shift from the bayonet-base 67 to the bayonet-base 97 between the 1970 and 1971 model years represents a change in wattage within the same base format, while the later introduction of the wedge-base 194 reflects a change in both base type and power draw.
Because the 194 uses a wedge base and the 97 and 67 use BA15s bayonet bases, fitment is year-specific and cross-year substitution between these bulb types is not supported by the socket designs associated with each model year.