Lexus IS350 Glove Box Bulb Size

The Lexus IS350 glove box utilizes 194 and 37 bulb sizes for the interior lighting components located inside the storage compartment. Data for the specific lighting requirements covers the period from 2006 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
2006-2009	37

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, 1W.	37

Other Locations

Additional Notes

The Lexus IS350 glove box uses two distinct bulb types across its model years: the 194 (T10) for 2021-2024 models and the 37 (T5) for 2006-2009 models.
Both the 194 and 37 bulbs are classified under ANSI standards applicable to the US and Canadian markets, and both operate on a 12-volt electrical system.
The 194 bulb is a T10 miniature wedge type rated at 3.78 watts, making it the higher-wattage of the two glove box bulbs used across the IS350's production span.
The 37 bulb is a T5 miniature wedge type rated at 1 watt, a notably lower output than the 194 used in later model years.
Although both bulbs share the same miniature wedge base design, the T10 and T5 designations indicate different physical sizes, meaning the 194 and 37 are not interchangeable with each other.
The T10 and T5 designations refer to the width of the wedge base in millimeters multiplied by a standard factor, with T10 being wider than T5, which determines socket compatibility.