condition	mean	min	max
4 h after light	7.694736666666667	7.2506699999999995	7.94215
8 h after light	7.818666666666667	7.4692300000000005	8.51282
12 h after light	7.66596	7.26777	8.07095
4 h after dark	7.694726666666666	7.5388	7.93169
8 h after dark	7.334193333333333	7.25028	7.463360000000001
12 h after dark	7.746040000000001	7.575830000000001	7.901730000000001