Lincoln Mark III Courtesy Bulb Size
The Lincoln Mark III courtesy light requires bulb size 168NA, 212-2, 211-2, or 631 depending on the specific application. Data for the bulb sizes covers the range from 1968 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 |
|---|---|
| 1971 | 168NA |
| 1970 | 212-2 |
| 1969 | 211-2 |
| 1968 | 631 |
Bulb Specifications
| Description | Bulb Size |
|---|---|
| ANSI standard (US & Canada). Miniature wedge bulb (T10), natural amber glass. 12V, 4.9W. | 168NA |
| ANSI standard (US & Canada). Festoon bulb, 41mm length, SV8.5 base. 12V, 12W. | 212-2 |
| ANSI standard (US & Canada). Festoon bulb, 41mm length, SV8.5 base. 12V, 12W. | 211-2 |
| ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Variant of 1156. 12V, 21W. | 631 |