condition mean min max 4 h after light 6.3222000000000005 5.1406 7.5038 8 h after light 9.01102 8.951 9.07104 12 h after light 10.294165 9.26803 11.3203 4 h after dark 10.357173333333334 9.85952 10.7576 8 h after dark 8.180113333333333 7.37084 8.67999 12 h after dark 7.88577 7.25012 8.52944