Spouse and I were returning from the store when we both saw two very bright orbs pass up ahead immediately after the car in front of us. The first in line was about the size of a junior soccer ball and yellowish white. The second, about 3 ft behind and in tight formation, was closer to baseball or softball sized and pure red. The line was absolutely straight. We never saw it waver. I don't know the speed except that it took about 3 seconds for them to cross our side of the highway and enter what we would soon learn is a large marsh.