Coplite California Light Kit # 3
Model 616 Swing Down Light 
Red
ON/OFF Switch On Rear
Headliner/Roof Mounting Bracket Is Unpainted.
The setup includes:
Amber
(1) Model 616 Halogen Lamp
(1) Steel seat bracket
(1) Standard mounting bail bracket
(1) Nut and bolt
(1) halogen flasher 
All components are new old stock
This kit will work with a variety of vehicles. This mounts directly to the existing seat bolts on your vehicle. 
This and similar setups were widely used by California agencies in the 80s and 90s
Rear light now includes a standard single flasher, FREE of CHARGE 🙂 This flasher will flash the rear light on and off. Flasher brand may vary from photo.
🔴 Air Bag Warning 🔵
Swing down lamps, stationary mounted lamps, hot shoe lamps, and any other visor type lamps, which are designed to be mounted in the area of the passengerside sun visor, should not be used in a vehicle which is equipped with a functional passengerside air bag, when the air bag has not been de-activated for law enforcement use or de-activated by the end user. No warning lamp should be mounted in the deployment zone of any functional air bag. Federal law now specifically provides an exemption from functional passengerside air bags for law enforcement vehicles.