The Lexus RC F parking light uses bulb size 7444NA or 7443NA depending on the specific version. Data for the lighting components covers the range from 2015 to 2019.
The year-by-year compatibility chart below provides a quick reference to verify the correct bulb size for your vehicle.
The Lexus RC F uses two closely related bulb types for its front parking light: the 7444NA and the 7443NA. Both are ANSI-standardized designations recognized in the United States and Canada.
Both the 7444NA and 7443NA are dual-filament wedge bulbs built on the T20 platform. The dual-filament design allows a single bulb to serve two brightness levels, typically a lower-intensity running or parking function alongside a higher-intensity signal function.
Both bulb types operate at 12 volts and carry a 21W/5W power rating. The 21-watt filament handles the brighter output, while the 5-watt filament handles the dimmer, always-on function.
The "NA" suffix in both designations refers to natural amber glass. This coloring is built into the glass envelope itself rather than applied as a coating, which produces the amber output required for parking and signal lighting without relying on a colored lens.
For the 2017-2019 Lexus RC F, the front parking light position lists the 7444NA as the specified bulb size.
A second set of specifications for the same vehicle covers model years 2015-2019 and shows a split: the 7443NA is specified for 2015-2018, while the 7444NA is specified for 2019.
The 7444NA and 7443NA share the same voltage, wattage, filament count, base type, and glass treatment. Despite their near-identical specifications, they carry distinct ANSI part numbers and are not confirmed as interchangeable within these specifications.