REDARC Enhanced Lighting ControllerThe REDARC Enhanced Lighting Controller enhances the brightness level of your REDARC gauge. When you don't have a dimming circuit to connect your gauge or it doesn't dim to your preference, the lighting controller allows you to choose both brightness and color. The GA ELC is 24 volt capable and only one is necessary for a set of gauges. Once you've programmed your chosen dimness and color, the gauge will change based on nighttime and daytime settings.