condition mean min max 0 h after light 34.1816 32.0894 36.2738 2 h after light 17.1133 15.4901 18.7365 4 h after light 13.26305 12.7067 13.8194 8 h after light 11.26635 10.1771 12.3556 12 h after light 15.3047 15.2758 15.3336 2 h after dark 14.77435 13.702 15.8467 4 h after dark 18.359 18.1146 18.6034 8 h after dark 30.9013 28.8881 32.9145 12 h after dark 35.81775 32.3886 39.2469