My kids are afraid of ghosts. My son thinks white lights are spirits. This morning he told me he saw a shaking white light. It was on the wall directly across from the window. Coincidentally, the light shook every time the air conditioner came on. Furthermore, the oblong shape was identical to the shape of the hole in the wooden blinds on his window.
Looks like I need to buy new flashlight batteries for the flashlight my daughter left outside his window.