condition	mean	min	max
4 h after light	7.63512	7.53715	7.78834
8 h after light	7.734223333333333	7.507689999999999	8.05096
12 h after light	7.485476666666668	7.385160000000001	7.624810000000001
4 h after dark	7.31888	7.09125	7.44055
8 h after dark	7.10694	6.98773	7.17673
12 h after dark	7.351266666666667	7.10722	7.631060000000001