condition mean min max 3 h after light 9.1885475 4.22974 15.7336 7 h after light 11.479885833333334 3.09627 18.9068 11 h after light 10.4915725 2.14369 16.3192 2 h after dark 9.331301666666667 2.6503 17.4701 6 h after dark 8.806473333333333 3.79821 20.4021 10 h after dark 9.119475833333333 2.58389 16.5517