condition	mean	min	max
4 h after light	7.469003333333333	7.40234	7.54409
8 h after light	7.546270000000001	7.42687	7.611160000000001
12 h after light	7.22839	7.1117	7.362989999999999
4 h after dark	7.500226666666666	7.2823199999999995	7.621389999999999
8 h after dark	7.459416666666667	7.270110000000001	7.6036399999999995
12 h after dark	7.254536666666667	7.13616	7.33818