condition	mean	min	max
4 h after light	7.56112	7.34593	7.69943
8 h after light	7.417543333333334	7.22107	7.6627
12 h after light	7.233486666666667	6.97832	7.4199600000000006
4 h after dark	7.4652199999999995	7.2953399999999995	7.5975
8 h after dark	7.727776666666667	7.6052800000000005	7.94538
12 h after dark	7.5059933333333335	7.343960000000001	7.6004