Ford Focus Dome Light Bulb Size

The Ford Focus dome light uses a 6411 bulb size for interior illumination. The replacement chart covers 2008 through 2011 vehicle production years with corresponding bulb specifications.

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 Type	Shop
2008-2011	6411	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Festoon bulb, 36mm length, SV8.5 base. 12V, 5W.	6411	Check Price

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Additional Notes

The Ford Focus (2008-2011) uses the 6411 bulb for the dome light across all four model years listed.
The 6411 is a festoon-style bulb, meaning it is cylindrical in shape and makes contact at both ends rather than through a screw or bayonet base.
The 6411 bulb has an SV8.5 base, which refers to the end-cap contact style standard for festoon bulbs of this size category.
At 36mm in length, the 6411 fits festoon sockets designed specifically for that span, and substituting a bulb of a different length risks poor contact or fitment failure.
The 6411 operates at 12 volts and 5 watts, which is consistent with low-draw interior lighting applications in passenger vehicles.
The 6411 carries an ANSI designation, indicating it conforms to a standardized specification recognized in both the United States and Canada.