Freightliner FL80 Roof Marker Bulb Size

The Freightliner FL80 roof marker utilizes a 194 bulb size for illumination purposes. Available information covers a span of time starting in 1991 and ending in 2005.

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	US Type	EU Type	Shop
1991-2005	194	W5W	Check Price

Bulb Specifications

Description	Type	Shop
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W.	194	Check Price
ECE standard (Europe & worldwide). Single-filament signalling bulb with W2.1x9.5d wedge base. 12V, 5W.	W5W	Check Price

Other Locations

Additional Notes

The Freightliner FL80 uses the 194 bulb for the roof marker position across all listed model years, spanning 1991-2005.
The 194 is classified as a miniature wedge bulb under the T10 designation, which refers to its tubular glass envelope measuring 10 eighths of an inch in width.
The wedge base design means the 194 bulb is held in place by the socket gripping the base of the glass envelope directly, with no separate metal base or pins involved.
The 194 operates at 12 volts with a power draw of 3.78 watts, placing it among the lower-wattage bulbs used in commercial vehicle marker lighting.
The 194 carries ANSI standardization recognized in both the United States and Canada, meaning the specification conforms to a defined interindustry standard rather than a proprietary one.
Because the 194 is an ANSI-standardized type, other bulbs sharing the T10 wedge form factor and the same voltage and wattage ratings are generally considered interchangeable with it in compatible sockets.
The T10 wedge format is also the basis for many LED retrofit bulbs, though any substitute must match the 12V operating voltage to avoid damage to the socket or the vehicle's electrical circuit.