condition mean min max 4 h after light 8.670285 7.4348 9.90577 8 h after light 7.596165 6.39772 8.79461 12 h after light 10.455435 9.91447 10.9964 4 h after dark 9.88332 9.60783 10.1906 8 h after dark 11.110566666666667 10.1407 11.662 12 h after dark 8.64633 8.55766 8.73952