Volkswagen Vanagon Dome Light Bulb Size

Additional Notes

• The Volkswagen Vanagon uses the 6411 bulb for its dome light across all listed model years, spanning 1980-1991.
• The 6411 is a festoon-style bulb, meaning it is cylindrical in form and makes contact at both ends rather than through a traditional plug-in base.
• The 6411 bulb measures 36mm in length, which is a standard festoon size also found in many other European and domestic vehicles of the same era.
• It uses an SV8.5 base, a designation that refers to the contact cap style at each end of the festoon body, with 8.5mm indicating the cap width.
• The bulb operates at 12 volts and draws 5 watts, placing it in the low-wattage category typical of interior courtesy lighting applications.
• The 6411 designation follows the ANSI standardization system used in the United States and Canada, which assigns numeric codes to bulbs based on their physical and electrical characteristics.
• Because the 6411 is an ANSI-coded bulb, it is interchangeable with any other bulb carrying the same code, regardless of manufacturer, provided the physical and electrical specifications match.
• Festoon bulbs of differing lengths are not interchangeable even when voltage and wattage ratings match, so the 36mm length of the 6411 is a critical fitment factor for the Vanagon dome light socket.