condition	mean	min	max
4 h after light	7.087829999999999	6.98843	7.14622
8 h after light	7.360963333333333	7.283989999999999	7.4271
12 h after light	7.472729999999999	7.298660000000001	7.580989999999999
4 h after dark	7.633616666666667	7.4478800000000005	7.751530000000001
8 h after dark	7.723063333333333	7.64975	7.83812
12 h after dark	7.751276666666667	7.536569999999999	8.060310000000001