condition	mean	min	max
4 h after light	9.32905	9.17055	9.59073
8 h after light	9.394816666666667	9.16019	9.69025
12 h after light	9.461963333333333	9.244580000000001	9.798010000000001
4 h after dark	9.10772	8.99593	9.2911
8 h after dark	9.195876666666667	8.97012	9.62762
12 h after dark	9.176829999999999	8.99748	9.469489999999999