Chevrolet Corvette Courtesy Bulb Size

Additional Notes

• The 194 bulb is the most frequently specified courtesy bulb size across the Chevrolet Corvette range, appearing in model years 1981, 1998, 2000, and 2003-2012. It is a T10 miniature wedge bulb rated at 12V and 3.78W, conforming to ANSI standards for the US and Canadian markets.
• The 212-2 festoon bulb is the second most recurring type in these specifications, fitted to the Corvette in 1986, 1988, 1990, 1992-1994, and 1986. It uses an SV8.5 base, spans 41mm in length, and operates at 12V with a relatively high 12W draw compared to other courtesy bulb types listed here.
• The 906 bulb shares the T10 wedge form factor with the 194 but draws significantly more power at 8W versus 3.78W. It is specified for model years 1978-1979, 1982, 1984-1985, and 1989, making it the third most common type in these specifications.
• The 12961 is a Philips-branded part number rather than an ANSI standard designation. It is a T10 wedge bulb with a W2.1x9.5d base rated at 12V and 5W, and it is specified for the Chevrolet Corvette in 2014-2016.
• The 90 and 89 bulbs both use a BA15s bayonet base and share a 12V, 13W rating, placing them in the same electrical class. The 90 is specified from 1962-1967 and 1969-1970, while the 89 appears in 1955-1959, 1972-1973, and again in later isolated years, indicating these two types served overlapping roles across different production periods.
• The 631 bulb carries the highest wattage of any type in these specifications at 21W. It uses a BA15s bayonet base and is noted as a variant of the 1156 bulb. It is specified for the Corvette in 1968, 1975, and 1976.
• The 561 festoon bulb, specified for the 1987 model year, differs from the 212-2 festoon in its contact type. Where the 212-2 uses an SV8.5 base, the 561 uses end-cap contacts and measures 44mm in length, making the two festoon types physically incompatible despite sharing the same 12V, 12W rating.
• The T5 wedge bulbs 37, 73, and 74 represent the lowest-wattage group in these specifications. The 37 is rated at 1W, while the 73 and 74 are each rated at 1.4W. All three are ANSI-standard T5 miniature wedge types, and the 73 and 74 are electrically near-identical, though they carry distinct ANSI designations.
• The 1445 bulb uses a BA9s base, which is a small bayonet cap format distinct from the BA15s base shared by the 89, 90, and 631 types. Rated at 12V and 2W, it is specified for the Corvette in 1974, 1977, and 1980.
• Across the full span of these specifications, no single bulb type is used continuously throughout all model years, and several bulb types recur non-consecutively. This pattern indicates that courtesy bulb fitment on the Corvette changed multiple times across production generations, and substitution between types is not supported by these specifications without confirming base type, physical length where applicable, and wattage compatibility.