Chevrolet Camaro Courtesy Bulb Size

Additional Notes

• The 631 bulb is the most frequently specified courtesy bulb across Chevrolet Camaro model years, covering 1967-1971 and 1977-1989. It is an ANSI-standard single-filament bulb with a BA15s bayonet base, rated at 12V and 21W, and is a variant of the widely known 1156 bulb type.
• The 12961 bulb is the most common specification for the Chevrolet Camaro courtesy light in modern production years, covering 2010-2013 and 2016-2019. It is a Philips-designated miniature wedge bulb in the T10 form factor with a W2.1x9.5d base, rated at 12V and 5W.
• The 194 bulb appears across 1990 and 1995-2002. Like the 12961, it is a T10 miniature wedge bulb, though it carries an ANSI designation rather than a manufacturer part number and is rated at a lower 3.78W.
• The 12961 and 194 share the same T10 wedge form factor, but their wattage ratings differ. The 12961 is rated at 5W while the 194 is rated at 3.78W, which is a relevant distinction when evaluating interchangeability between modern and earlier model years.
• The 192 bulb, specified for 1991-1993, is also a T10 miniature wedge type under the ANSI standard, rated at 12V and 3W. Its wattage is lower than both the 194 and the 12961, making direct substitution a consideration that depends on socket and circuit tolerances.
• Three festoon bulb types appear in the specifications: the 211-2 (1972), the 212-2 (1974-1976), and the 562 (1994). The 211-2 and 212-2 are both 41mm festoon bulbs with SV8.5 bases rated at 12V and 12W, while the 562 is a 44mm festoon with end-cap contacts also rated at 12V and 12W.
• Although the 211-2 and 212-2 share the same voltage, wattage, and base type, their listed lengths differ by 0mm and 0mm respectively in the provided data, both at 41mm. The 562, however, is 44mm in length, which means it is not a drop-in substitute for the SV8.5-based festoon types despite matching voltage and wattage.
• The 89 bulb, specified for 1973, uses the same BA15s bayonet base as the 631 but is rated at 13W rather than 21W. These two bulb types are physically compatible in terms of base fitment, but their differing wattage ratings distinguish them as separate specifications within the Camaro courtesy light history.
• The 562 festoon bulb specified for 1994 carries a notably higher wattage of 12W compared to the T10 wedge types used in surrounding years. This reflects a distinct socket design for that model year rather than a variation within a shared bulb family.
• Across the full specification range, four distinct base types are represented: the W2.1x9.5d wedge base (12961), the wedge base without a manufacturer-specific designation (194, 192), the BA15s bayonet base (631, 89), and the festoon end-cap configurations (211-2, 212-2, 562). These base type differences mean bulbs from different groups are not interchangeable regardless of voltage or wattage similarity.