condition	mean	min	max
4 h after light	7.459056666666667	7.15918	7.687360000000001
8 h after light	7.430063333333334	7.187880000000001	7.6177600000000005
12 h after light	7.4864999999999995	7.2334	7.64313
4 h after dark	7.88842	7.75064	8.05781
8 h after dark	7.625286666666667	7.2908800000000005	7.93964
12 h after dark	7.805619999999999	7.597689999999999	7.94538