Some of my lights flick for a second as the washer or dryer kicks in. The lights don't dim otherwise I know it's a problem for sure. The lights affected are in area with separated circuit. Is this normal? Not only that, while I play DVD, it flicks also when those heavy power machine kicks in. My house is 1.5 yr old and for the first year, this never occurred. It started happening this summer. I live in California so I was thinking perhaps it's the change of power delivery/usage around the area. Any thoughts?