condition mean min max 4 h after light 5.001645 4.42047 5.58282 8 h after light 18.461199999999998 18.4184 18.504 12 h after light 52.788 52.0619 53.5141 4 h after dark 31.14835 30.4827 31.814 8 h after dark 11.1555 10.8763 11.4347 12 h after dark 5.61353 5.14933 6.07773