condition	mean	min	max
4 h after light	7.154076666666667	7.05812	7.21669
8 h after light	7.26719	7.200480000000001	7.307460000000001
12 h after light	7.264983333333333	7.1395	7.4615
4 h after dark	7.275973333333333	7.199439999999999	7.3396300000000005
8 h after dark	7.2343866666666665	7.12684	7.4043600000000005
12 h after dark	7.05226	6.85318	7.21957