There were lights on the object.
There was an aura or haze around the object.
The object made a sound.
This happened when I was 8 years old in Penuela, Puerto Rico.
Around 7:00 p.m. I was outside playing alone.
I heard a sound of bees buzzing overhead as though a very large and angry swarm were about to attack.
I took cover on the ground and when I looked up and to the side from my prone position on the ground I saw a hovering circular and very large round aircraft with many lights shining from underneath the craft.
It took off after a few seconds.