Freightliner 108SD Dome Light Bulb Size

The Freightliner 108SD dome light requires a 211-2 bulb size for proper illumination within the interior cabin area. Data provided for the specific component covers the range from 2012 through 2017.

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 Type	Shop
2012-2017	211-2	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Festoon bulb, 41mm length, SV8.5 base. 12V, 12W.	211-2	Check Price

Other Locations

Additional Notes

The Freightliner 108SD uses the 211-2 bulb for its dome light across the 2012-2017 model years.
The 211-2 is a festoon-type bulb, meaning it is cylindrical in shape and makes contact at both flat ends rather than through a traditional socket pin or bayonet base.
The bulb carries an SV8.5 base designation, which refers to the 8.5mm cap width at each end of the festoon body.
At 41mm in length, the 211-2 fits within a specific range of festoon holders; substituting a bulb of a different length risks poor contact or physical incompatibility with the dome light housing.
The 211-2 operates at 12 volts and draws 12 watts, which is consistent with standard 12V vehicle electrical systems.
The 211-2 is an ANSI-standardized bulb recognized in both the United States and Canada, meaning units sourced from either market share the same specification.
Because festoon bulbs rely on spring-loaded end caps for retention, the physical length of a replacement bulb is a critical fitment factor, not just the wattage or voltage rating.