condition	mean	min	max
4 h after light	6.44113	6.2434	6.6696100000000005
8 h after light	6.533423333333333	6.3825	6.74817
12 h after light	6.6725	6.37941	7.0987100000000005
4 h after dark	6.651816666666667	6.3199	7.12697
8 h after dark	6.660406666666667	6.11062	7.414860000000001
12 h after dark	6.645676666666667	6.578130000000001	6.7354