condition	mean	min	max
4 h after light	6.79351	6.683160000000001	6.89049
8 h after light	6.739043333333334	6.51769	6.872260000000001
12 h after light	6.7771566666666665	6.65745	6.980589999999999
4 h after dark	6.695273333333334	6.589230000000001	6.76892
8 h after dark	6.6251299999999995	6.37731	7.03153
12 h after dark	6.350086666666667	6.015630000000001	6.5237099999999995