U.S. Sen. Sherrod Brown is urging General Electric officials to make new investments at its lamp plants in Warren and Ravenna rather than close the two facilities, which the bulb maker announced last week it planned to do in early 2014.

In a letter Brown released Thursday, he tells GE Lighting CEO Maryrose Sylvester that the company can build on the success of its decision to bring jobs back to the U.S. by bringing new lighting production to the two facilities.

GE could enhance its Ohio lighting portfolio while also capitalizing on the great assets that Ohio workers have to offer, Brown said.