condition	mean	min	max
4 h after light	8.353636666666667	8.2145	8.607619999999999
8 h after light	8.000333333333334	7.797960000000001	8.16665
12 h after light	8.225859999999999	8.18559	8.26934
4 h after dark	8.627766666666666	8.48147	8.751380000000001
8 h after dark	8.72965	8.55984	9.015080000000001
12 h after dark	8.741483333333333	8.63988	8.903139999999999