Mercury Lynx Dome Light Bulb Size

The Mercury Lynx dome light utilizes 1816 and 906 bulb sizes for interior illumination. Available data covers the period from 1981 through 1987 for the specified vehicle components.

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
1987	1816
1981-1986	906

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T3.25). 12V, 4W.	1816
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 8W.	906

Other Locations

Additional Notes

The 906 bulb is the dome light specification for the Mercury Lynx across the 1981-1986 model years, making it the predominant fitment across the vehicle's production run covered by these specifications.
The 1987 Mercury Lynx transitions to the 1816 bulb for the dome light, which differs from the 906 used in all prior listed years.
Both the 906 and 1816 are ANSI-standardized miniature wedge bulbs rated for 12V automotive electrical systems, though they differ in wattage and physical size.
The 906 is a T10 miniature wedge bulb rated at 8W, while the 1816 is a T3.25 miniature wedge bulb rated at 4W, meaning the 1816 draws half the wattage of the 906.
The T10 and T3.25 designations refer to the outer envelope width of the bulb measured in eighths of an inch, so a T10 bulb is 10/8 inches wide and a T3.25 bulb is 3.25/8 inches wide, indicating a notably smaller physical profile for the 1816.
Because the 906 and 1816 differ in both physical size and wattage, they are not interchangeable between the 1981-1986 and 1987 model years despite both using a wedge base type.