You guys have all seen a tiny flicker in the lights, where they either go dim or shut off completely for a very small period of time - usually less than half a second. It typically does not cause computers to shut down. What duration of abnormal power is usually associated with this? What voltage drop is normal? (If it helps, I am referring to residential power systems in the US) Also, does anyone have any quick suggestions on how to simulate this with a few 120VAC relays?