Late 1959, bright lights from a hovering object of unknown shape making a zed-zid zed-zid electrical sound.

I've always wanted to recount this as it is one of those unexplained things from childhood that I've never forgotten. I was 5 years old and we were moving bit by bit into our new house. I was "helping" my mom take things out to the car. She was going to take me with her to the new house that evening and I was excited about getting to play in all the new rooms. I remember going out the back door with something in my hand that I was going to take to the car. Mom was still inside the house. There was a very, very bright light. I looked up and there, hovering above the house, was this huge object that just seemed to be made up of very white, bright lights. I have no idea what shape it was and could not see anything but the lights. It was silent except for a strange electrical sound -- zed-zid, zed-zid -- and started to slowly move away from the house. I remember screaming and running inside, terrified and crying. I don't know how articulate I was in trying to get my mother to look outside and see if it was gone. She didn't see anything and couldn't understand why I was so upset. I refused to go outside again that night and lost all interest in going to the new house to play.
Date of sighting is approximate.  PD