condition mean min max 4 h after light 6742.4 6742.4 6742.4 8 h after light 8304.05 7975.6 8632.5 12 h after light 9440.2 9337.6 9542.8 4 h after dark 9774.55 9698.4 9850.7 8 h after dark 10133.45 8521.5 11745.4 12 h after dark 8761.2 7377.8 10144.6