condition mean min max 4 h after light 1757.7 1757.7 1757.7 8 h after light 1321.65 1285.8 1357.5 12 h after light 1572.85 1399.8 1745.9 4 h after dark 1250.55 1057.6 1443.5 8 h after dark 930.45 643.2 1217.7 12 h after dark 893.75 703.6 1083.9