condition mean min max 4 h after light 663.5 663.5 663.5 8 h after light 523.95 491.6 556.3 12 h after light 819.45 585.1 1053.8 4 h after dark 1142.85 1108.6 1177.1 8 h after dark 1262.3 1148.8 1375.8 12 h after dark 1018.3499999999999 991.6 1045.1