Buick Skylark Dome Light Bulb Size

Additional Notes

• The Buick Skylark dome light specifications cover model years 1954 through 1998, with four distinct bulb types appearing across that span: the 211-2, 561, 562, and 214-2 festoon types, along with the 194 wedge, the 1004 dual-filament bayonet, and the 90 single-filament bayonet.
• The 561 is the most frequently specified bulb in the Buick Skylark dome light data, covering model years 1976-1988. It is a festoon-style bulb rated at 12V and 12W, with a 44mm length and end-cap contacts.
• The 562 shares the same 44mm festoon form factor, end-cap contact design, 12V rating, and 12W output as the 561. Both are ANSI-standardized bulbs for the US and Canadian markets.
• Despite their identical electrical and physical specifications, the 561 and 562 are listed as separate part numbers and are not confirmed as interchangeable within these specifications. Substituting one for the other without verification of fitment compatibility carries risk.
• The 211-2 and 214-2 are both 41mm festoon bulbs with an SV8.5 base, rated at 12V and 12W. The SV8.5 base uses a different mounting interface than the end-cap contacts found on the 561 and 562, making cross-substitution between these two groups physically incompatible.
• The 211-2 appears across multiple non-consecutive model years from 1962 through 1975, while the 214-2 is specified for 1995-1997. Their shared physical and electrical characteristics reflect the same festoon format under different ANSI designations.
• The 1971 Skylark is the only model year in the specifications to use the 194 bulb for the dome light. The 194 is a T10 miniature wedge-base bulb rated at 12V and 3.78W, a significantly lower wattage than all other bulb types listed in these specifications.
• The 1004 bulb, specified for the 1963 and 1968 Skylark, is a dual-filament bulb with a BAY15d bayonet base and a 12V, 21/5W rating. It is noted as a variant of the 1157 and represents a fundamentally different base type from all other bulbs in these specifications.
• The 90 bulb, specified for the 1954 and 1961 Skylark, uses a BA15s single-contact bayonet base rated at 12V and 13W. The BA15s base is distinct from the BAY15d base of the 1004, as the latter offsets its two contact pins to prevent incorrect installation of a dual-filament bulb in a single-filament socket.
• The range of base types across the Skylark dome light specifications, including end-cap festoon, SV8.5 festoon, T10 wedge, BAY15d bayonet, and BA15s bayonet, means that no single bulb from these specifications is a physical substitute for any bulb from a different base-type group.