Vero Beach Fla, 1960's; low, huge hovering disk over highway shooting colored lights out the back with illuminated windows.

In about 1963, making me about 10 yrs old, and my family, (my father, a mechanical engineer for Carrier Corporation, my Mother, and my 15 yr old sister, all of sound mind), were on a highway in Vero Beach Fla.just about 8 PM, as I remember.
Just above us, appeared a stationary UFO, hovering without sound.
This was huge and very close overhead, causing all traffic to come to a halt.
People exited their cars and just stared at this huge metallic disk with white lights in windows, shooting colored lights out the bottom in one horozontal direction; red, green- I can’t remember how many colors absolutely. It was a clear, unobstructed, overhead view.
It was nothing else, but a UFO, and everyone outside their cars were pointing at it.  We got in the car to continue to our lodging, watching the news for an explanation.  In the morning, the newspaper or TV (I can’t remember, but my parents said that the reports of the sighting were numerous, but the official release was "weather balloons").
My family knew that explanation was impossible.   I remember how disappointed we were that they were NOT truthful in disclosing what it really was! We then visited my grandparents (in Vero Beach) and they were telling them about the UFO sighting.