Chevrolet Corvette Clock Light Bulb Size

Additional Notes

• The 1895 bulb is the most frequently specified clock light across the Chevrolet Corvette model years covered, appearing in the 1968-1973 and 1976 and 1985 model years. It is a T5 miniature wedge bulb rated at 12V and 0.9W, making it one of the lower-wattage options in these specifications.
• The 1816 bulb is a T3.25 miniature wedge type rated at 12V and 4W. It is specified for the Chevrolet Corvette clock across the 1963-1967 model years, representing a higher wattage draw than both the 1895 and the 194 within the wedge bulb category.
• The 194 bulb is a T10 miniature wedge type rated at 12V and 3.78W. It is specified for the 1981-1982 Corvette clock, and while it shares the same wedge base style as the 1895 and 1816, its physical T10 size differs from both, meaning the three wedge types are not directly interchangeable despite their shared base design.
• The 1958-1962 Corvette clock specifications list two bulb sizes simultaneously, the 57 and the 257. The 57 is a single-filament BA9s base bulb at 12V and 1W, while the 257 is rated at 12V and 2W with either a festoon or BA9s base configuration, indicating these two bulbs serve distinct positions or variants within the clock assembly for those years.
• The 57 bulb also appears alone for the 1959 and 1961 model years without the accompanying 257 listing, while the 257 is paired with the 57 in 1958, 1959, 1960, and 1962, suggesting the clock assembly in certain years required only one of the two BA9s-compatible bulbs.
• The 67 bulb, specified for the 1955-1957 Corvette clock, carries a notably higher wattage of 8W at 12V compared to all other bulbs in these specifications. It uses a BA15s bayonet base and is described as a lower-wattage variant of the 1156 bulb type, placing it in a different base family entirely from the wedge and BA9s types used in later years.
• The 63 bulb, specified for the 1953-1954 Corvette clock, is the lowest-wattage bulb in these specifications at 0.63W and 12V. It shares the BA9s base with the 57 and 257 bulbs but is not interchangeable with them due to its distinct wattage and ANSI designation.
• Three separate base types are represented across these specifications: the wedge base (used by the 1895, 194, and 1816), the BA9s base (used by the 57, 257, and 63), and the BA15s bayonet base (used by the 67). Bulbs from different base families are physically incompatible with one another regardless of voltage rating.
• All bulbs listed across these specifications share a 12V operating voltage, which is consistent with standard automotive electrical systems. Wattage, however, ranges from 0.63W for the 63 bulb up to 8W for the 67 bulb, a span that reflects meaningful differences in heat output and socket load across the model years.
• All bulb sizes referenced in these specifications conform to ANSI standards applicable in both the United States and Canada, indicating that sourcing replacements through North American automotive supply channels is consistent with the original equipment designations.