condition	mean	min	max
4 h after light	8.910516666666666	8.795960000000001	9.013869999999999
8 h after light	8.99992	8.93095	9.05375
12 h after light	9.20109	9.19112	9.21919
4 h after dark	8.81365	8.79376	8.84758
8 h after dark	8.47854	8.23968	8.81405
12 h after dark	8.475866666666667	8.3628	8.603489999999999