condition mean min max 4 h after light 7.981586666666667 4.35897 10.6048 8 h after light 2.236422 0.388126 4.40248 12 h after light 2.6517063333333333 0.919299 5.3325 4 h after dark 5.42828 2.83573 7.16899 8 h after dark 8.61291 3.90398 12.2015 12 h after dark 13.56735 7.46355 22.8102