condition mean min max 4 h after light 722.9 722.9 722.9 8 h after light 822.2 780.8 863.6 12 h after light 914.8 829.1 1000.5 4 h after dark 783.6500000000001 759.6 807.7 8 h after dark 815.55 660.2 970.9 12 h after dark 772.4 752.5 792.3