LARGE OBJECT ON GROUND WITH BILLBOARD SIZE LIGHTS STROBING.

I AM A RETIRED CHIEF AVE. BOATS'N MATE.  FIRST SAW, FROM U.S. 17, TWO MILK WHITE LIGHTS, ABOUT THE SIZE OF A STANDARD BILLBOARD, OVER TREES GROWING ON ABANDONED R/R.  THEY WERE STEADILY LIT.  TURNED LEFT ON GA 110.  ABOUT 4 MI. LATER SAW SAME LIGHTS IN FRONT OF ABOUT 100 FT. PINES.  THERE WERE 5 BILLBOARD SIZE LIGHTS IN A ROW, 4 ABOVE, 3 ABOVE THEN 2 ABOVE. THE TOP TWO WERE ABOVE ABOUT 100 FT. PINES. THE LIGHTS WERE STROBING.  IT APPEARED ABOUT FOUR FT. BETWEEN LIGHTS IN ROW.  LIGHTS DID NOT GLARE OR CAST LIGHT ON GROUND, BUT WAS MILK WHITE. THE EDGES OF LIGHTS WERE KNIFE EDGE SHARP.  COULD NOT SEE CRAFT ONLY A DARKER AREA, IT APPEARED TO BE FLAT OVAL WITH SMALLER FLAT OVAL ON TOP, WHICH HAD THE TWO LIGHTS.  THIS THING WAS ON THE GROUND AND HUGE. IT WAS SITTING WHERE TIMBER HAD JUST BEEN CLEAR CUT.