condition	mean	min	max
4 h after light	9.161516666666667	8.971789999999999	9.264330000000001
8 h after light	9.33277	9.31274	9.34895
12 h after light	9.34948	9.11515	9.535160000000001
4 h after dark	9.335180000000001	9.276710000000001	9.41562
8 h after dark	9.135546666666666	9.01505	9.31077
12 h after dark	9.17508	9.109119999999999	9.26821