Glowing low flying lights in formation over Rockport, MA.Six glowing orange / reddish circular lights (not flashing). We pulled over & got out to see. They appeared to be flying at about 1,000 feet, in single file about 100 yards apart, moving over the water from Pigeon Cove towards Bearskin Neck. There was NO noise & No wind. Planes on approach to Logan airport were visible at a much higher altitude in the distance with flashing lights. There were other people out walking their dogs that stopped too. No clue what they were, but not helicopters and not airplanes.