condition mean min max 3 h after light 159.479 143.43 177.019 6 h after light 95.30573333333334 81.7632 106.666 9 h after light 54.525666666666666 43.14 60.9776 12 h after light 70.22595 15.8028 229.545 3 h after dark 15.9249 14.8181 16.683 6 h after dark 30.1402 27.2062 31.8602 9 h after dark 90.00513333333333 75.5252 98.4949 12 h after dark 249.17399999999998 248.422 249.926