There lighting setup is pretty well hidden. They only have a couple of very small white leds in the grille that you can actually see, everthing else is pretty stealth inside which you can't see anyways due to the very dark tint.
I am a tech at the dealership this county brings their police fleet to. I really don't know why they put the mods on them, the two cops who only get to drive the mustangs are gearheads themselves. I am told the purpose of the mustangs is combat aggressive driving and street racing.