condition	mean	min	max
4 h after light	6.785593333333334	6.660889999999999	6.96513
8 h after light	6.931276666666666	6.81217	7.141039999999999
12 h after light	7.08911	7.02452	7.17886
4 h after dark	6.95163	6.6673800000000005	7.33874
8 h after dark	7.052239999999999	6.802339999999999	7.35071
12 h after dark	6.711456666666667	6.629289999999999	6.77652