condition	mean	min	max
4 h after light	8.599926666666667	8.518889999999999	8.74311
8 h after light	8.68712	8.612589999999999	8.78562
12 h after light	8.909153333333332	8.80926	9.002239999999999
4 h after dark	8.73493	8.69662	8.75954
8 h after dark	8.665903333333333	8.52541	8.77085
12 h after dark	8.820116666666667	8.64633	9.00739