condition	mean	min	max
4 h after light	7.39924	7.130269999999999	7.53597
8 h after light	7.35043	7.19418	7.43008
12 h after light	7.309116666666667	6.98866	7.47248
4 h after dark	7.520146666666666	7.3678300000000005	7.63817
8 h after dark	7.40177	6.953989999999999	7.660760000000001
12 h after dark	7.469453333333334	7.17108	7.647130000000001