Pontiac Firebird Dome Light Bulb Size

Additional Notes

• The Pontiac Firebird dome light draws from three festoon bulb types across most of its model years: the 211-2, the 214-2, and the 561. All three operate at 12 volts and follow ANSI standards recognized in both the United States and Canada.
• The 561 is the most frequently specified festoon bulb in these dome light records, appearing across the 1978-1989 span as well as several earlier years, making it the dominant fitment across the Firebird's production history.
• The 561 festoon bulb measures 44mm in length and uses end-cap contacts, meaning electrical contact is made at each flat end of the bulb rather than through a base socket. It is rated at 12 watts.
• The 211-2 and 214-2 are both 41mm festoon bulbs sharing the SV8.5 base type and identical 12V, 12W electrical ratings. The SV8.5 base features a single contact pin on each end cap, seating into a spring-loaded holder.
• Although the 211-2 and 214-2 share the same base type, voltage, wattage, and length, they are distinct ANSI part numbers and are not guaranteed to be interchangeable in all applications without confirming physical fitment in the specific housing.
• The 561 and the 211-2/214-2 festoon bulbs differ in length by 3mm, with the 561 at 44mm and the others at 41mm. This length difference affects whether a bulb seats correctly in a spring-loaded festoon holder, and substituting one for the other risks poor contact or fitment failure.
• The Pontiac Firebird (1971) is the sole model year in these specifications to use the 194 bulb for the dome light. The 194 is a T10 miniature wedge bulb rated at 3.78 watts, which is substantially lower in power output than the festoon types used in all other listed years.
• The 194 wedge bulb uses a plastic wedge base rather than a festoon-style holder, meaning the 1971 dome light housing accepts a fundamentally different bulb format than those found in surrounding model years.
• The Firebird transitioned between bulb types at several points in its production run. The 1990-1992 years use the 211-2, while 1993-1994 shift to the 214-2, and 1996 returns to the 561, reflecting changes in dome light housing design across generations.
• All festoon bulbs listed in these specifications are ANSI-standardized, meaning equivalent bulbs from different manufacturers sharing the same ANSI designation are produced to the same dimensional and electrical specifications.