SC coastal residents near Charleston witness single file orange lights at 8 PM moving slowly due North, eventually fading from sightMy neighbors reported seeing about 20 round orange lights in a single file formation, moving slowly and noiselessly in a synchronized, due North direction across the night sky above Sullivan's Island SC from the vantage point of the Intra-coastal Waterway causeway road connecting Sullivan's Island and Mount Pleasant SC. My neighbors were traveling on this road as were many other people, most of whom stopped along the side of this causeway as they did, to stare and wonder. When asked about the height of these lights, they explained they could appear to be a slow moving formation of helicopters, but helicopters around here and at that height make a loud sound. That many of them would definitely have been heard. But from these, no sound emanated or was heard. Also, they explained that these lights diminished in intensity, or in number, from sight as a few at a time and eventually all of them, faded out of sight, like wicker oil lamps being turned down then off.