Volvo 240 Dome Light Bulb Size

The Volvo 240 dome light requires a bulb size of 6411 for the interior lighting system. Data for the specified component covers the range from 1990 to 1993.

The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.

Bulb Size by Year Range

Years	Bulb Size
1990-1993	6411

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Festoon bulb, 36mm length, SV8.5 base. 12V, 5W.	6411

Other Locations

Additional Notes

The Volvo 240 uses the 6411 bulb for the dome light across the 1990-1993 model years.
The 6411 is an ANSI-standardized bulb, meaning its specifications are governed by a recognized North American standard applicable in both the United States and Canada.
The 6411 is a festoon-type bulb, which is a cylindrical lamp that mounts by pressing its two end caps into spring clips rather than inserting into a socket.
The 6411 bulb has a 36mm length, which is the critical fitment factor for festoon bulbs, as the physical span between the spring clips in the housing must match this figure.
The base type for the 6411 is SV8.5, a designation that refers to the diameter of the end caps on a festoon bulb, measured in millimeters, and must correspond to the clip width in the fixture.
The 6411 operates at 12 volts, consistent with the standard electrical system voltage found in passenger vehicles of this era.
The 6411 has a rated wattage of 5W, placing it in the low-power range typical of interior courtesy lighting applications.
Because festoon bulbs are defined by both length and end cap size, substituting a bulb of a different length or SV rating risks a loose fit or failure to make electrical contact, even if the voltage and wattage are otherwise compatible.