Chevrolet Beretta Courtesy Bulb Size

The Chevrolet Beretta courtesy light utilizes 168 and 561 bulb sizes for the interior lighting system. Data for the specific components covers the range from 1987 through 1994.

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
1991-1994	168
1990	561
1987-1989	168

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 4.9W.	168
ANSI standard (US & Canada). Festoon bulb, 44mm length, end-cap contacts. 12V, 12W.	561

Other Locations

Additional Notes

The 168 bulb is the predominant courtesy bulb type across the Chevrolet Beretta's production run, appearing in the 1987-1989 and 1991-1994 model years.
The 168 is a T10 miniature wedge bulb rated at 12 volts and 4.9 watts, conforming to ANSI standards for the US and Canadian markets.
The wedge base of the 168 bulb is retained by friction within its socket, relying on the bulb's own base rather than a separate metal cap or pins for contact.
The 1990 Chevrolet Beretta departs from the otherwise consistent fitment, specifying a 561 festoon bulb for the courtesy light position.
The 561 festoon bulb operates at 12 volts and 12 watts, drawing considerably more power than the 168 used in surrounding model years.
A festoon bulb makes electrical contact through metal end caps at each end of the cylindrical glass envelope, a mounting style physically incompatible with a wedge-type socket.
The 561 festoon bulb has a 44mm length, a specification relevant to socket fitment, as festoon holders are sized to match the bulb's end-to-end span.
The physical and electrical differences between the 168 wedge and the 561 festoon mean the two types are not interchangeable, despite both being 12-volt courtesy bulbs within the same model line.