condition	mean	min	max
4 h after light	7.592323333333333	7.36562	7.7124
8 h after light	7.41974	7.2237	7.66489
12 h after light	7.4435633333333335	7.39907	7.51403
4 h after dark	7.44104	7.0515300000000005	7.667039999999999
8 h after dark	7.384506666666667	7.21243	7.51072
12 h after dark	7.19088	6.92139	7.389710000000001