Provides capability for a zone on a grafik eyer control unit (or other product) to dim a fully loaded circuit of lighting.May be used to control incandescent, electronic low-voltage, magnetic low-voltage, and Neon/cold cathode lighting sources, as well as Lutron tuv-wire fluorescent dimming ballasts.Automatically selects leading-edge or trailing-edge dimming for low-voltage transformers.Provides power and dimming for one zone.Up to 3 power modules may be wired on a single grafik eye zone