Buick Estate Wagon Dome Light Bulb Size

The Buick Estate Wagon dome light utilizes bulb sizes 561, 211-2, 212-2, 194, 1004, and 90 depending on the specific production version. Available data covers the period from 1959 through 1983.

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
1974-1983	561
1973	211-2
1972	212-2
1971	194
1970	211-2
1962-1964	1004
1961	211-2
1960	90
1959	1004

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Festoon bulb, 44mm length, end-cap contacts. 12V, 12W.	561
ANSI standard (US & Canada). Festoon bulb, 41mm length, SV8.5 base. 12V, 12W.	211-2
ANSI standard (US & Canada). Festoon bulb, 41mm length, SV8.5 base. 12V, 12W.	212-2
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W.	194
ANSI standard (US & Canada). Dual-filament bulb with BAY15d bayonet base. Variant of 1157. 12V, 21/5W.	1004
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. 12V, 13W.	90

Other Locations

Additional Notes

The bulb size 561 is the most frequently specified dome light bulb for the Buick Estate Wagon, covering the 1974-1983 model years without variation.
The 561 is a festoon-type bulb rated at 12V and 12W, with a 44mm length and end-cap contacts that seat against metal clips at each end of the housing rather than using a conventional base socket.
The 211-2 is also a festoon bulb rated at 12V and 12W, but at 41mm in length with an SV8.5 base, making it physically shorter than the 561 despite sharing the same wattage rating.
The 212-2, specified for the 1972 Estate Wagon, shares the same 41mm length, SV8.5 base, 12V, and 12W ratings as the 211-2, making these two bulbs technically near-identical in specification.
Although the 211-2 and 212-2 share nearly identical specifications, they carry distinct ANSI designations and are not formally listed as interchangeable, so substitution between them warrants verification against the specific fixture design.
The 561 and the 211-2 or 212-2 are all festoon bulbs operating at 12V and 12W, but the 3mm difference in length between the 561 (44mm) and the shorter festoon types (41mm) means they are not interchangeable without confirming the fixture's contact span.
The 194, specified for the 1971 Estate Wagon, is a miniature wedge bulb of the T10 form factor rated at only 3.78W, a substantially lower wattage than all other bulb types listed in these specifications.
The 1004, specified for the 1959 and 1962-1964 Estate Wagon, is a dual-filament bulb with a BAY15d bayonet base and a 21/5W rating, classifying it as a variant of the 1157 family, which is more commonly associated with exterior stop and tail light applications.
The bulb size 90, specified for the 1960 Buick Estate Wagon, uses a BA15s single-contact bayonet base rated at 12V and 13W, a base type that is not shared by any other bulb in these specifications.
Across the full span of these specifications, five distinct bulb types are listed for the dome light position, reflecting that no single bulb type was used across all model years covered.