condition	mean	min	max
4 h after light	8.468456666666667	8.45947	8.479280000000001
8 h after light	8.591943333333333	8.51748	8.654069999999999
12 h after light	8.721390000000001	8.640460000000001	8.7795
4 h after dark	8.79008	8.727360000000001	8.82773
8 h after dark	8.582583333333334	8.55616	8.62565
12 h after dark	8.41602	8.32421	8.586260000000001