condition	mean	min	max
4 h after light	7.649823333333333	7.4581800000000005	7.85955
8 h after light	8.04723	7.839980000000001	8.327210000000001
12 h after light	7.843283333333333	7.78941	7.87392
4 h after dark	8.22583	8.14326	8.32137
8 h after dark	8.387626666666666	8.233939999999999	8.612589999999999
12 h after dark	8.381136666666666	8.06902	8.64352