condition	mean	min	max
4 h after light	6.919923333333333	6.811839999999999	7.05929
8 h after light	7.064493333333333	7.02485	7.12908
12 h after light	7.1028	7.06827	7.15917
4 h after dark	7.2503	7.21887	7.28901
8 h after dark	7.4894066666666665	7.38825	7.567819999999999
12 h after dark	7.624973333333334	7.541910000000001	7.753360000000001