condition mean min max 4 h after light 727.8 727.8 727.8 8 h after light 674.95 610.7 739.2 12 h after light 750.15 724.9 775.4 4 h after dark 920.55 876.9 964.2 8 h after dark 849.75 810.2 889.3 12 h after dark 876.5 860.5 892.5