condition mean min max 4 h after light 8.32998 8.12912 8.53275 8 h after light 8.340326666666666 8.28417 8.42469 12 h after light 8.790043333333333 8.593869999999999 8.97743 4 h after dark 9.22755 8.82992 9.55537 8 h after dark 9.472629999999999 9.142669999999999 9.68845 12 h after dark 9.657713333333334 9.47391 9.8536