The Radiance 3 wire multi-trigger harness is designed specifically for RIGID Radiance LED light bars. Equipped with two independent circuits for an easy install, circuit one is designed for higher amperage and utilizes a relay to power the primary LEDs on the Radiance light bar while circuit two is designed for low amperage and has no relay for the backlighting circuit on the Radiance. The Radiance multi-trigger harness also comes standard with two separate backlit LED rocker switches, 1 red, 1 blue, each circuit can be used independently. Fits 10-50 in. Radiance and 10-54 in. Radiance Curved LED light bars.