Isuzu Ascender Dome Light Bulb Size

The Isuzu Ascender dome light requires a 194 bulb size for proper illumination within the interior cabin area. Available data for the specified component covers the period from 2003 to 2008.

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
2003-2008	194

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W.	194

Other Locations

Additional Notes

The Isuzu Ascender uses the 194 bulb for the dome light across all listed model years, spanning 2003-2008.
The 194 is an ANSI-standardized bulb type recognized across the United States and Canada, meaning it conforms to a defined set of electrical and physical specifications shared by all compliant manufacturers.
It belongs to the T10 miniature wedge family, a form factor characterized by a wedge-shaped base that seats directly into a socket without requiring a separate metal cap or pins.
The bulb operates at 12 volts, which is consistent with the standard electrical system voltage found in conventional passenger vehicles.
Its rated wattage of 3.78W places it in the low-power range, typical of interior courtesy and dome lighting applications where prolonged illumination without significant battery drain is a practical consideration.
The wedge base design of the T10 means the bulb is held in place by the tension of the socket contacts rather than a bayonet or screw mechanism, which affects how it is seated and removed.
Because the 194 is an ANSI-standardized type, direct-replacement bulbs from different manufacturers carrying the same designation are generally interchangeable, provided they meet the same voltage and wattage ratings.