condition mean min max 4 h after light 575.0 575.0 575.0 8 h after light 610.7 574.5 646.9 12 h after light 1025.25 554.7 1495.8 4 h after dark 1817.25 1309.0 2325.5 8 h after dark 1700.2 1484.5 1915.9 12 h after dark 1625.65 1434.0 1817.3