:? I have a customer complaining of her lights pulsing when the toaster oven is on. They are on different circuits. The lighting is on a arc fault breaker. I am going to check their phase's tomorrow. Is it possible it's just coincidence with a power surge/drop? I wouldn't doubt that other lights might be pulsing as well. It is an older toaster oven? Thanks for reading, and any input you might have.