condition mean min max 4 h after light 612.9 612.9 612.9 8 h after light 440.95 440.7 441.2 12 h after light 612.95 383.6 842.3 4 h after dark 718.65 710.3 727.0 8 h after dark 778.35 751.2 805.5 12 h after dark 657.25 616.5 698.0