condition	mean	min	max
4 h after light	7.66661	7.5967	7.70251
8 h after light	7.44987	7.39145	7.51819
12 h after light	7.53847	7.5007600000000005	7.5934800000000005
4 h after dark	7.430366666666667	7.14872	7.59322
8 h after dark	7.437643333333333	7.265619999999999	7.54015
12 h after dark	7.869093333333334	7.7808399999999995	7.94528