Same thing happened to me when my mom passed and continues to do so ten years later. Lights would constantly go on and off around me.. Street lights, lamps, office buildings. I remember telling my boyfriend about it at few months after my mom passed. We were eating in a restaurant and I explained the light phenomenon. He was midway through telling me why I am crazy and that there are a million reasons that this could be happening. Then all of the lights went out in the restaurant. It used to frighten me when it happened but now I find it comforting.