round metallic object with three white lights hovering at tree top level made no noise left at high rate of speed

Dark had recently fallen. My mother and I had to run an errand. Leaving our driveway, we turned south onto Main street. We noticed a round metallic object hovering just above the pine trees.  We were directly under the object hovering above Frazier Mill works in Hollyford area. It had three white lights forming a triangle and made no noise.
We continued traveling south slowly as I watched the object it turned into a ball of light and moved at a high rate of speed off to the east. When we returned home about 30 minutes later, military helicopters were flying all around the area .  I have never reported the incident until now.
Witness indicates that date of the sighting is approximate.  PD