condition	mean	min	max
4 h after light	6.815696666666667	6.645560000000001	7.0312399999999995
8 h after light	6.9578299999999995	6.8937	7.05775
12 h after light	7.057406666666667	6.952780000000001	7.16418
4 h after dark	6.76095	6.670030000000001	6.868289999999999
8 h after dark	6.689446666666667	6.5533	6.8453100000000004
12 h after dark	6.681643333333334	6.29801	6.9985800000000005