Saab 99 Dome Light Bulb Size

The Saab 99 dome light requires a 6411 bulb size for the interior lighting system. Data for the specific component covers the period from 1975 through 1980.

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
1975-1980	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 Saab 99 uses the 6411 bulb for the dome light across the 1975-1980 model years.
The 6411 is an ANSI-standardized bulb type, meaning its specifications are governed by a recognized North American standard used in both the United States and Canada.
The 6411 is a festoon-style bulb, which means it is cylindrical in shape and makes contact at both ends rather than through a traditional screw or bayonet base.
The bulb measures 36mm in length, which is a critical fitment factor, as festoon bulbs must physically span the socket contacts to seat correctly.
The 6411 uses an SV8.5 base, a designation that refers to the contact cap style and width at each end of the festoon bulb.
The bulb operates at 12 volts, consistent with the standard electrical system voltage found in passenger vehicles of this era.
The 6411 has a rated output of 5 watts, placing it in the low-wattage category typical of interior courtesy lighting applications.
When substituting the 6411, the 36mm length and SV8.5 base type must both match, as a difference in either specification would result in an improper fit within the Saab 99 dome light socket.