Denali DialDim Lighting Controller for Universal FitmentOur ground breaking DialDim Lighting Controller features a multicolor halo dimming switch that allows you to independently turn on off and dim two sets of 3 Wire auxiliary lights from a single consolidated wiring harness. The LED halo switch displays your exact settings and allows for effortless dimming on the fly. The blue halo controls light set one and the green halo controls light set two; simply double click to switch between the two circuits.