condition	mean	min	max
4 h after light	7.4802	7.3303899999999995	7.6819
8 h after light	7.55033	7.17802	7.94043
12 h after light	7.2478	7.10688	7.35898
4 h after dark	7.32305	6.86585	7.559360000000001
8 h after dark	7.263186666666666	7.123819999999999	7.487489999999999
12 h after dark	7.255310000000001	7.135280000000001	7.42525