In no State will they allow you to run lights mounted above the Grill on the hwy. Those are considered "Off-Road" lights. This includes factory equipped.
You may only run low beams if running 4 lights at a time.
In most States, Highbeams, even the 2 headlight systems count as 4 lights.
They made 4 lights legal when there was confusion regarding running Fog lights.
Fog lights get wired to the low beams.
Driving Lights get wired to the High Beams.
Be courteous when using either Fog or Drivng lights, even if your vehicle is factory equipped. If you get flashed, please dim to the lowest safe light setting.
Ron