condition mean min max 4 h after light 613.1 613.1 613.1 8 h after light 624.6500000000001 601.2 648.1 12 h after light 640.35 630.7 650.0 4 h after dark 628.05 608.7 647.4 8 h after dark 645.1500000000001 606.2 684.1 12 h after dark 529.45 524.6 534.3