condition	mean	min	max
4 h after light	9.2172315	8.933253	9.50121
8 h after light	8.753557	8.573861	8.933253
12 h after light	8.936426	8.589971	9.282881
4 h after dark	8.7840205	8.574137	8.993904
8 h after dark	8.931637	8.589971	9.273303
12 h after dark	9.084432	9.084432	9.084432