condition	mean	min	max
4 h after light	6.924873333333334	6.874680000000001	6.97843
8 h after light	6.956266666666667	6.8540600000000005	7.033110000000001
12 h after light	6.88391	6.80905	6.96657
4 h after dark	7.0781833333333335	6.91282	7.266769999999999
8 h after dark	6.876146666666666	6.7373899999999995	7.0533399999999995
12 h after dark	6.83572	6.77323	6.937069999999999