You can use these USB lights with any USB port. Of course our focus is on using them in a Tesla, but they'll work in any powered USB.
Once installed, refer to the instructions below on how to adjust them:
The lights will stay lit for as long as the USB port is powered (unless the ambient light is bright enough for them to not be needed). At the time of writing, a software update to Model 3 keeps the ports powered for a long time after the car is exited, but don't worry, these light consume a tiny amount of power - 0.145w at their maximum brightness, and just 0.018w at the lowest brightness. In context, a Black Vue dashcam consumes 4.2w, or 29x the consumption at maximum brightness.