condition	mean	min	max
4 h after light	8.362103333333334	8.31128	8.44656
8 h after light	8.378483333333334	8.252989999999999	8.5428
12 h after light	8.398263333333334	8.309510000000001	8.48827
4 h after dark	8.411153333333333	8.16221	8.6393
8 h after dark	8.312249999999999	8.232339999999999	8.46312
12 h after dark	8.134730000000001	8.11506	8.165980000000001