condition mean min max 4 h after light 9.31982 8.88112 9.75852 8 h after light 10.68933 9.88616 11.4925 12 h after light 6.13524 4.62955 7.64093 4 h after dark 5.07317 4.24015 5.64798 8 h after dark 5.811903333333333 5.23271 6.47927 12 h after dark 9.187243333333333 7.91865 10.1486