condition	mean	min	max
4 h after light	7.873166666666666	7.63863	8.03755
8 h after light	7.513599999999999	6.9248899999999995	7.99637
12 h after light	7.513996666666666	6.6165	8.29323
4 h after dark	7.79224	7.1169199999999995	8.55804
8 h after dark	7.869333333333333	7.26778	8.66058
12 h after dark	8.05503	7.63536	8.38826