The Lexus GX460 dome light utilizes 194 and 168 bulb sizes according to the provided specifications for the interior lighting components. Data for the specific bulbs covers the range from 2010 through 2023.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The 168 bulb is the most frequently specified type across the Lexus GX460 dome light data, covering model years 2010-2019. It is an ANSI-standard miniature wedge bulb in the T10 form factor, rated at 12V and 4.9W.
The 194 bulb shares the same T10 wedge form factor as the 168 but operates at a lower wattage of 3.78W versus 4.9W. Both conform to ANSI standards applicable in the US and Canada.
Because the 168 and 194 bulbs share the T10 physical form factor, they may fit the same socket, but their differing wattage ratings mean they are not electrically identical and should not be treated as direct substitutes without accounting for that difference.
The 12961 is a Philips part number rather than an ANSI designation. It specifies a T10 wedge bulb with a W2.1x9.5d base, rated at 12V and 5W, and is the specified type for the front and rear dome lights of the 2021-2023 GX460.
The W2.1x9.5d base designation on the 12961 describes a standardized wedge base where 2.1 refers to the wire contact width in millimeters and 9.5 refers to the pin spacing, providing a precise physical reference beyond the general T10 category.
The general dome light specification for the 2023 Lexus GX460 lists the 194 bulb, while the front and rear dome light sub-part specifications for the same year list the 12961. These are distinct positions within the vehicle's interior lighting system.
Across all three bulb types specified, the operating voltage is consistently 12V, which corresponds to the standard electrical system voltage in passenger vehicles.
The 12961 at 5W carries the highest wattage among the three specified bulb types, followed by the 168 at 4.9W and the 194 at 3.78W, reflecting incremental differences in power draw within the same T10 form factor family.