condition	mean	min	max
4 h after light	7.361406666666666	7.15842	7.581230000000001
8 h after light	7.339950000000001	7.3087800000000005	7.372260000000001
12 h after light	7.556403333333334	7.442410000000001	7.68157
4 h after dark	7.19902	6.99728	7.40762
8 h after dark	7.31449	7.101260000000001	7.46703
12 h after dark	7.194473333333334	7.09404	7.260460000000001