condition mean min max 4 h after light 2670.2 2670.2 2670.2 8 h after light 2164.45 1592.1 2736.8 12 h after light 998.5 558.6 1438.4 4 h after dark 732.3 611.6 853.0 8 h after dark 851.45 692.8 1010.1 12 h after dark 1366.55 869.5 1863.6