Rolls-Royce Ghost Dome Light Bulb Size

The Rolls-Royce Ghost dome light requires a 6411 bulb size for proper installation within the interior overhead lighting fixture. Available data covers the production range from 2010 through 2020 for the specified vehicle.

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
2010-2020	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 Rolls-Royce Ghost uses the 6411 bulb for its dome light across the 2010-2020 model years.
The 6411 is a festoon-style bulb, meaning it is cylindrical in shape and makes contact at both ends rather than through a screw or bayonet base.
The 6411 bulb uses an SV8.5 base, which refers to the end-cap contact style standard for festoon bulbs of this type.
The bulb measures 36mm in length, which is the span between its two end contacts and determines physical fitment within the dome light housing.
The 6411 operates at 12 volts and 5 watts, consistent with standard low-draw interior lighting in passenger vehicles.
The 6411 designation follows ANSI standards applicable in both the United States and Canada, indicating a standardized specification rather than a proprietary part number.
Because the 6411 is an ANSI-standardized festoon bulb, replacement units from different manufacturers sharing the same designation are generally interchangeable, provided the 36mm length and SV8.5 base are matched exactly.
Festoon bulbs of differing lengths, such as 31mm or 41mm variants, are not compatible with a housing specified for 36mm, as the contact points would not align correctly.