Chevrolet Brookwood High Beam Indicator Bulb Size

Additional Notes

• The 194 bulb is the most frequently specified size for the Chevrolet Brookwood high beam indicator, appearing across the 1969-1970 and 1972 model years. It is an ANSI-standard miniature wedge bulb in the T10 form factor, rated at 12V and 3.78W.
• The 53 bulb is specified for the 1958-1960 model years. It is an ANSI-standard single-filament bulb with a BA9s base, rated at 12V and 2W.
• The 1971 model year is the sole entry specifying the 1895 bulb. This is an ANSI-standard miniature wedge bulb in the smaller T5 form factor, rated at 12V and 0.9W, making it the lowest-wattage bulb across all listed model years.
• The 1961 model year specifies the 257 bulb, an ANSI-standard festoon or BA9s base instrument bulb rated at 12V and 2W.
• The 194 and 1895 bulbs both use a wedge base, but they differ in form factor and wattage. The T10 194 draws 3.78W while the T5 1895 draws 0.9W, meaning the two are not interchangeable despite sharing a base style category.
• The 257 and 53 bulbs share the same voltage and wattage ratings at 12V and 2W, but the 257 accommodates either a festoon or BA9s base while the 53 is strictly a BA9s single-filament type, which affects physical fitment.
• All bulb sizes listed across the Brookwood high beam indicator specifications conform to ANSI standards applicable in both the United States and Canada.
• Four distinct bulb types are specified across the eight listed model years, indicating that no single bulb size is a universal fit for the Brookwood high beam indicator across its full production span.