Ford F-350 Roof Marker Bulb Size

The Ford F-350 roof marker utilizes 168 and 97 bulb sizes for the exterior lighting components located on the top of the vehicle cabin. Data for the specific lighting requirements covers the period from 1973 through 1979.

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

YearsBulb Size
1978-1979168
1973-197797

Bulb Specifications

Description Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 4.9W.168
ANSI standard (US & Canada). Single-filament bulb with BA15s bayonet base. Variant of 1156. 12V, 13W.97

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