To make this only an f1 light and not run always at night just connect the fog light wire green and brake wire red to the brown wire on the oem brake light wire brown.
Subaru f1 brake light.
This is a complete replacement housing that fits in the spot where your reverse lights are to operate both as a reverse light and a brake light.
This light can be wired to work as just a brake fog or running light or you can also include the f1 style flasher that will flash when the brake pedal is pressed.
While many states allow brake lights that flash and then turn solid some do not.
Here you are looking at the gcs f1 style v2 4th brake light reverse light.
F1 style led brake light nslumo red lens rear fog lights brake stop tail lamp assembly for 2011 2018 subaru wrx sti xv impereza car lighting source red lens 4 0 out of 5 stars 12 65 99 65.
F1 style rear brake lamp 2011 subaru wrx sti.
Is a flashing brake light allowed.
You will need to check your local jurisdiction if the strobe function is legal for on road use if you chose to use it.