condition mean min max 4 h after light 2.7538799999999997 2.31716 3.1906 8 h after light 2.3173250000000003 2.23869 2.39596 12 h after light 2.14059 2.07021 2.21097 4 h after dark 3.8382733333333334 3.42124 4.30068 8 h after dark 3.1116800000000002 2.82914 3.52703 12 h after dark 3.5525366666666667 2.85523 3.95501