Lexus IS300 Glove Box Bulb Size

The Lexus IS300 glove box light uses bulb size 74 and bulb size 194. Available data for the specified components covers the range from 2001 through 2024.

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
2023-2024	194
2021	194
2001	74

Bulb Specifications

Description	Bulb Size
ANSI standard (US & Canada). Miniature wedge bulb (T10). 12V, 3.78W.	194
ANSI standard (US & Canada). Miniature wedge bulb (T5). 12V, 1.4W.	74

Other Locations

Additional Notes

The 194 bulb is an ANSI-standard miniature wedge type with a T10 form factor, rated at 12V and 3.78W, recognized across the US and Canadian markets.
The 74 bulb is also an ANSI-standard miniature wedge type, but with a smaller T5 form factor, rated at 12V and 1.4W.
The T10 and T5 designations refer to the width of the wedge base, with T10 being physically larger than T5. These two bulb types are not interchangeable despite sharing the same wedge-base mounting style.
The Lexus IS300 uses the 194 (T10) bulb for the glove box across the 2021-2024 model years.
The 2001 IS300 uses the 74 (T5) bulb for the glove box, which draws significantly less wattage than the 194 used in later model years.
The wattage difference between the two bulb types, 3.78W for the 194 versus 1.4W for the 74, reflects a difference in light output and circuit load that makes cross-year substitution electrically inadvisable.