condition mean min max 4 h after light 581.0 581.0 581.0 8 h after light 583.25 469.1 697.4 12 h after light 720.05 709.1 731.0 4 h after dark 789.5 688.1 890.9 8 h after dark 709.0 639.2 778.8 12 h after dark 714.95 650.7 779.2