The street lights in a Northampton road are being switched on and off every time a woman makes a cup of tea.
Sally Barnet told BBC Radio Northampton that when she switches her kettle on, the lights along Trussell Road, in Great Billing go off.
She said: "Just when I go to make a cup of tea in the morning, I switch the kettle on and the street lights go on and it's darkness in the kitchen.
"Everybody laughs at me. I'm not mad, it's actually happened."
Mrs Barnet's son-in-law Ken Platt said that "for once" his mother-in-law was right: "I even checked the level of the sherry bottle to make sure but she is absolutely 100% correct."
Power firm E.on UK told the BBC the company had spoken to the customer and will be sending an engineer to the address on Thursday evening to take a look.