condition	mean	min	max
4 h after light	7.831426666666667	7.461760000000001	8.01857
8 h after light	7.7651433333333335	7.607	7.91962
12 h after light	8.002443333333334	7.9219100000000005	8.0534
4 h after dark	7.91982	7.7515600000000004	8.03473
8 h after dark	7.622873333333334	7.24368	7.855580000000001
12 h after dark	7.79591	7.65233	7.87851