condition	mean	min	max
4 h after light	7.479629999999999	7.41677	7.52842
8 h after light	7.42715	7.328880000000001	7.55577
12 h after light	7.569496666666667	7.51817	7.6160000000000005
4 h after dark	7.317846666666666	7.19365	7.3865
8 h after dark	7.435003333333333	7.19574	7.63506
12 h after dark	7.50199	7.33051	7.61101