Lexus LS400 License Plate Bulb Size

The Lexus LS400 license plate light requires a 168 bulb size for proper illumination of the rear vehicle area. Available information covers the production span from 1990 to 2000.

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
1990-2000	168

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 4.9W.	168

Other Locations

Additional Notes

The 168 bulb is the specified license plate bulb size for the Lexus LS400 across all listed model years, spanning 1990-2000.
The 168 bulb follows the ANSI standard recognized in both the United States and Canada, placing it within a regulated specification framework common to North American automotive lighting.
It belongs to the T10 miniature wedge form factor, a base type that uses a wedge-shaped plastic body in place of a metal screw base, allowing the bulb to be held in place by tension within the socket.
The 168 operates at 12 volts, which corresponds to the standard electrical system voltage found in conventional passenger vehicles.
Its rated wattage of 4.9W reflects a low power draw, consistent with the secondary lighting role of a license plate lamp.
The T10 wedge base is shared by several bulb numbers in the same family, meaning physical fitment alone does not confirm electrical compatibility. Wattage and voltage ratings of any replacement should match the 168 specification to avoid socket or circuit issues.