Rotating Saucer Shaped Object with Multicolored Lights Flying Over Jacksonville

I have debated whether I should share this story or not, but this has bothered me for almost 31 years.  Although time has faded my memory of the exact date and time of this event.  I will attempt to re-account my sighting.
 I was around 7 years old at them and it was in the evening perhaps in the spring/summer of 1976 and my parents, younger brother and I had stopped by a local McDonalds for a bite to eat.  
We were eating inside our car in the parking lot when both my brother and I noticed a low flying rotating object flying over a strip mall across the street.  My parents dismissed it as an airplane or helicopter or something rationale, since Cecil Field was very close to this area,  but my brother and I were just fixated on this object!  
The object was maybe 400-600 ft. up in the air as it flew over this strip mall moving from left to right in our field of vision.  The object was circular with multicolored lights (red, green, blue, etc.) around its edges, it rotated like a carousel with a slight tilt to the right and angled facing us so you could see it was circular.  I could see all the individual lights and the object itself rotating clockwise.  The object also had a single light on the top that illuminated a little bit of the surface around it.  
We did not hear any noise that would suggest an airplane, helicopter or blimp. 
We eventually lost sight of this object, but I was left very shaken and the event has remained etched in my mind ever since.
Witness indicates that the date of the event is approximate.  PD