Object seen: circular orange glow at back of laboring hum like deisel or electric motor sound. 3-4 lighted globes ejected object w/orange glow

I was the only witness to my knowledge - there were no subsequent news reports that I saw thru the years.  I was on the sidewalk in front of my home at Approx 10:00pm when I heard this sound discribed above coming my way but hidden by trees - when the sound was directly over head I saw nothing until the sound was past me - I saw a circular glow accompany the heavy hum before it went behind trees again.  Maybe 10 secs later I saw it again when bright balls appeared to float off of the UFO and down behind trees in a densely populated area of the city. It was moving too slow to be an airplane and WAS NOT A HEPICOPTER.  I am curious if you had similar reports from that time and city. I have told noone