My lights dim when the AC comes on. I called the power company out to check the connections. He checked the meter and I checked the panel.
He told me a story about a service call that was interesting. He said he went to the call and the customer said when they flushed the toilet that his security light went out.
The problem was found to be the well pump was causing enough drop that his HID security light would go out.
Pretty funny story that I am sure has been told more than once, but I wanted to hear it again.