Porsche 912 Dome Light Bulb Size

Additional Notes

• The 6411 is the sole dome light bulb size listed for the Porsche 912 across all model years covered in the specifications.
• Model year coverage runs from 1965-1969 and 1976, with the 6411 bulb specified for each of those years.
• The 6411 bulb follows the ANSI standard, meaning it conforms to a standardized specification recognized in both the United States and Canada.
• It is a festoon-type bulb, a form factor characterized by a cylindrical body with contact caps at each end rather than a screw or bayonet base.
• The bulb measures 36mm in length, which is a defining fitment factor for festoon bulbs, as physical length determines whether the bulb seats correctly within the dome light housing.
• The 6411 uses an SV8.5 base, a designation that refers to the size and style of the end caps on a festoon bulb, with 8.5mm indicating the cap width.
• Electrical ratings are 12 volts and 5 watts, consistent with standard low-power interior lighting in 12-volt automotive electrical systems.
• Because festoon bulbs are sized by both length and base width, substituting a festoon bulb of a different length or base size would result in an incorrect fit even if the voltage and wattage ratings matched.