condition	mean	min	max
4 h after light	8.031996666666666	7.80005	8.1917
8 h after light	7.807753333333334	7.5120000000000005	8.0265
12 h after light	7.68637	7.3818600000000005	7.911910000000001
4 h after dark	7.87934	7.645510000000001	8.04979
8 h after dark	7.900453333333333	7.74557	8.03031
12 h after dark	7.792036666666666	7.5222	7.931089999999999