condition mean min max 4 h after light 9.834446666666667 9.75114 9.88345 8 h after light 10.257786666666666 10.18501 10.35355 12 h after light 10.046800000000001 9.92102 10.207 4 h after dark 9.552396666666667 9.34336 9.83257 8 h after dark 9.64006 9.53001 9.739239999999999 12 h after dark 9.46333 9.35314 9.529119999999999