condition mean min max 4 h after light 1054.3 1054.3 1054.3 8 h after light 820.2 716.3 924.1 12 h after light 742.45 688.6 796.3 4 h after dark 816.25 743.4 889.1 8 h after dark 818.5 818.1 818.9 12 h after dark 1021.1 782.8 1259.4