There are 6,624 State Parks and 58 National Parks in the United States alone.
80a Relay High Power relay
These high power relays have a continuous rating of 80a at 12v, making them uniquely suited for our Phantom Sun series of light bars. These relays use a 12v coil and 12vdc switching.
They are non-grounding mount so you need to run a ground to one of the coil studs, then a switched power to the other. Then hook a fused wire from your battery to one of the larger studs and your light bar power wire to the other large stud.