condition	mean	min	max
4 h after light	6.295693333333333	6.27899	6.31758
8 h after light	6.41556	6.28618	6.4955
12 h after light	6.26764	6.16665	6.3993400000000005
4 h after dark	6.3414166666666665	6.31409	6.38201
8 h after dark	6.254276666666667	6.01914	6.51208
12 h after dark	6.44743	6.35049	6.54117