condition	mean	min	max
4 h after light	7.4454633333333335	7.364560000000001	7.51013
8 h after light	7.5406933333333335	7.510489999999999	7.591360000000001
12 h after light	7.38763	7.09813	7.661989999999999
4 h after dark	7.50258	7.40976	7.6145
8 h after dark	7.586266666666667	7.49397	7.696610000000001
12 h after dark	7.537143333333334	7.50515	7.55788