I recently ran into a car salesman at a party named Adam. Along with his natural affinity for anything car-related, he also carries with him an undying love for his favorite television show of all time, 1982’s Knight Rider.
Out on the street he had his 1992 Camaro with a special light installed on the front grill, just like the on on K.I.T.T. This dude is a FAN.
The light as seen while standing in front of the car:
The accompanying device/controller, mounted inside the car on the dashboard: