Chevrolet Chevelle Dome Light Bulb Size

The Chevrolet Chevelle dome light utilizes a 211-2 bulb size for illumination within the interior cabin area of the vehicle. Available data covers a time range from 1964 through 1973 for the specified lighting component.

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
1964-1973	211-2	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Festoon bulb, 41mm length, SV8.5 base. 12V, 12W.	211-2	Check Price

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Additional Notes

The Chevrolet Chevelle dome light uses the 211-2 bulb across all listed model years from 1964-1973.
The 211-2 is a festoon-type bulb, meaning it mounts by pressing horizontally between two spring clips rather than inserting into a socket.
The 211-2 bulb measures 41mm in length, which is a critical fitment factor, as festoon bulbs must match the exact span of the fixture's contact points.
The 211-2 uses an SV8.5 base, a designation that refers to the smooth, rounded metal caps at each end of the festoon body with an 8.5mm cap width.
The bulb operates at 12 volts and draws 12 watts, consistent with standard 12V automotive electrical systems of that era.
The 211-2 designation follows ANSI standards recognized in both the United States and Canada, indicating a standardized specification rather than a proprietary part number.
Because the 211-2 is an ANSI-standardized festoon bulb, replacement units from multiple manufacturers are generally interchangeable provided they match the 41mm length and SV8.5 base specification.
Festoon bulbs of differing lengths, such as the common 31mm or 36mm variants, are not compatible with this application despite sharing a similar physical form factor.