condition mean min max 0 h after light 3.740995 3.66241 3.81958 4 h after light 3.817235 3.6314 4.00307 8 h after light 6.40882 5.63775 7.17989 4 h after dark 7.638035 7.53228 7.74379 8 h after dark 5.799715 5.41931 6.18012 12 h after dark 4.770035 4.71751 4.82256