condition mean min max 4 h after light 687.3 687.3 687.3 8 h after light 687.4 672.3 702.5 12 h after light 696.55 673.7 719.4 4 h after dark 851.8 677.5 1026.1 8 h after dark 864.75 746.5 983.0 12 h after dark 763.2 660.7 865.7