Mercury LN7 License Plate Bulb Size

The Mercury LN7 license plate light requires 194 and 168 bulb sizes for the specific lighting components. Data for the bulb sizes covers the 1982 to 1983 range.

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
1983	194
1982	168

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W.	194
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 4.9W.	168

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Additional Notes

The T10 wedge form factor is the miniature wedge base type used across both model years of the Mercury LN7 license plate bulb fitment. This base type is characterized by a wedge-shaped glass envelope that seats directly into a socket without a separate metal base or pins.
The 194 bulb, fitted to the 1983 Mercury LN7, operates at 12 volts and draws 3.78 watts, placing it at a lower wattage output than its 1982 counterpart.
The 168 bulb, fitted to the 1982 Mercury LN7, operates at 12 volts and draws 4.9 watts, making it the higher-wattage of the two bulb types listed in these specifications.
Both the 194 and 168 bulbs carry ANSI standardization recognized in the United States and Canada, meaning their physical and electrical characteristics conform to a defined industry standard rather than a proprietary specification.
Although the 194 and 168 share the same T10 wedge form factor and voltage rating, their wattage values differ. This distinction is relevant to fitment, as the two bulb types are not electrically identical despite their physical similarity.