The Radiance Multi-Trigger Harness was designed specifically for the Rigid Industries? Radiance light bar. Equipped with two independent circuits for an easy install, circuit one is designed for higher amperage and utilizes a relay to power the primary LED?s 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 (red and blue), so each circuit can be used independently. The Radiance Multi-Trigger Harness makes installation of your Rigid Industries? Radiance as simple and clean as possible.