Hummer H2 License Plate Bulb Size

The Hummer H2 license plate light requires a 194 bulb size for proper illumination of the rear registration area. Data for the specified component covers the range from 2003 to 2009.

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
2003-2009	194

Bulb Specifications

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

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Additional Notes

The 194 bulb is the sole license plate bulb size listed for the Hummer H2 across all model years covered by these specifications, spanning 2003-2009.
The 194 is a miniature wedge-type bulb, classified under the T10 form factor, which refers to a tubular bulb body approximately 10 millimeters wide at its widest point.
The wedge base design means the bulb is held in place by the socket walls themselves rather than by a separate metal base with pins, which is a common trait of low-wattage automotive lighting applications.
The 194 operates at 12 volts and draws 3.78 watts, placing it among the lower end of automotive bulb power consumption, consistent with its use in a non-illumination-critical position such as a license plate lamp.
The 194 carries ANSI standardization recognized in both the United States and Canada, meaning the specification conforms to a defined set of electrical and physical parameters shared across compliant bulbs from different manufacturers.
Because the 194 is an ANSI-standardized type, direct-replacement bulbs from multiple manufacturers are generally interchangeable at the socket level, provided they conform to the same T10 wedge base and 12V rating.