Crews are dismantling the production traces at the LEDVANCE lightbulb manufacturing plant in St. Marys, EcoLight Pa. The factory was shut down after producing lightbulbs for greater than a century. Crews are dismantling the manufacturing lines on the LEDVANCE lightbulb manufacturing plant in St. Marys, Pa. The manufacturing facility was shut down after producing lightbulbs for EcoLight LED more than a century. A revolution is upsetting the lighting enterprise as LED lightbulbs change power-hogging incandescent ones. This is excellent news for shoppers and EcoLight the environment