condition	mean	min	max
4 h after light	8.514396666666666	8.313189999999999	8.622069999999999
8 h after light	8.037486666666666	7.4257100000000005	8.351230000000001
12 h after light	7.8659	7.543589999999999	8.02966
4 h after dark	7.87325	7.62885	8.08359
8 h after dark	8.031559999999999	7.673589999999999	8.26395
12 h after dark	8.333633333333333	8.12623	8.51443