unexplainable bright light hovering at treetop level off highway

I was driving south of the town of lincolton  on Hwy 321 business approx 4 miles south of Lincolnton when I and spotted a bright orb  that appeared to cover both sides of the road as it remained stationary at treetop level.  It took off in flight at a phenomenal speed, grew smaller in the sky as it disappeared. My brother was a passenger in my vehicle and is the only other witness that I'm aware of.