condition mean min max 0 h after light 17.6538 17.14 18.1676 4 h after light 7.4741599999999995 7.09842 7.8499 8 h after light 5.7616499999999995 5.17796 6.34534 4 h after dark 7.182895 6.73346 7.63233 8 h after dark 9.409215 8.49483 10.3236 12 h after dark 14.5624 11.2348 17.89