condition	mean	min	max
4 h after light	8.32941	8.26435	8.383519999999999
8 h after light	8.323970000000001	8.19293	8.432080000000001
12 h after light	8.534089999999999	8.50259	8.58719
4 h after dark	8.69698	8.50822	8.83924
8 h after dark	8.562723333333333	8.52303	8.61563
12 h after dark	8.480556666666667	8.38083	8.538260000000001