condition	mean	min	max
4 h after light	8.42507	8.26723	8.58708
8 h after light	8.559050000000001	8.43345	8.753160000000001
12 h after light	8.752346666666666	8.32023	9.07647
4 h after dark	8.42844	8.112219999999999	8.741660000000001
8 h after dark	8.256443333333333	7.968999999999999	8.644639999999999
12 h after dark	8.381406666666667	8.08182	8.6789