condition	mean	min	max
4 h after light	9.286863333333335	9.188260000000001	9.33717
8 h after light	9.347526666666667	9.240789999999999	9.501710000000001
12 h after light	9.55045	9.51827	9.58272
4 h after dark	9.25971	9.21113	9.31599
8 h after dark	9.19458	8.998660000000001	9.39087
12 h after dark	9.118386666666666	9.05906	9.1939