condition mean min max 2 h after light 13.421055 7.16203 17.3349 6 h after light 18.3461 14.0032 21.658 10 h after light 15.018221666666667 5.97893 21.2933 14 h after light 19.94945 10.9357 26.4396 18 h after light 22.085933333333333 13.364 32.1317 2 h after dark 15.923533333333333 11.573 20.8808