...when I was young. Was it a so-called UAP, unidentified aerial phenomenon?

I was outside, my back turned to the light, so I did not see the light source itself, but of course I saw the light around me. My mother saw the light from the kitchen window, my sister and brother from the living room window... the only one who did not see anything was my father, because he was sleeping. It was an August evening, already dark.

My sister saw it best, she could even tell where the source of light was, near the corner of our house. We all went outside and tried to find something, burned grass, anything odd, but were not able to find anything. We decided it must have been some kind of lightning, though there was no sound at all.