condition mean min max 3 h after light 3.10336 1.16479 4.56914 6 h after light 4.08632 3.8771 4.28904 9 h after light 4.654816666666666 4.23267 4.94051 12 h after light 5.16184 4.15521 6.79224 3 h after dark 7.553263333333333 7.36677 7.67817 6 h after dark 12.86531 8.95373 18.6394 9 h after dark 6.327486666666667 3.59484 9.93652 12 h after dark 2.47104 2.30395 2.77711