condition mean min max 4 h after light 8.909063 8.449243 9.368883 8 h after light 8.531921 7.979891 9.083951 12 h after light 8.774894 8.196836 9.352952 4 h after dark 9.5935505 8.597644 10.589457 8 h after dark 7.845233499999999 7.567619 8.122848 12 h after dark 9.142457 9.142457 9.142457