condition mean min max 4 h after light 9.75374 9.368883 10.138597 8 h after light 9.011713499999999 8.110463 9.912964 12 h after light 9.806136500000001 8.926507 10.685766 4 h after dark 9.301726500000001 9.018075 9.585378 8 h after dark 9.974272 9.190629 10.757915 12 h after dark 9.169417 9.169417 9.169417