condition	mean	min	max
4 h after light	7.63923	7.554360000000001	7.68536
8 h after light	7.768026666666667	7.63125	8.01627
12 h after light	7.531733333333333	7.452369999999999	7.571969999999999
4 h after dark	7.517196666666667	7.337910000000001	7.67259
8 h after dark	7.481306666666667	7.34007	7.65488
12 h after dark	7.58654	7.48177	7.78538