just finished our HT and have a slight challenge. I have a Lutron Grafik Eye. Seems that when the lights are turned on, I hear a hum from the speakers. As soon as the lights are turned off, the hum stops. I seem to remember that the electrician did not connect the ground wire from the Grafik Eye to the ground wires coming in from the light fixtures. Could this be causing the problem? Appreciate any feedback.