condition	mean	min	max
4 h after light	7.638406666666667	7.5342199999999995	7.71322
8 h after light	7.294696666666666	7.19188	7.428139999999999
12 h after light	7.63591	7.612080000000001	7.654160000000001
4 h after dark	7.509483333333334	7.421360000000001	7.67647
8 h after dark	7.670973333333333	7.4290199999999995	7.9513
12 h after dark	7.54247	7.449	7.68325