General Electric (GE) said it has not been able to substantiate allegations of overworked employees and unsafe working conditions at its Chinese fluorescent-lighting joint venture, Xiamen Topstar Lighting, Bloomberg reported. Policy Matters Ohio, a US nonprofit organization, alleged in a report based on interviews with workers at the Fujian province factory that Xiamen Topstar Lighting subjects workers to 64-hour workweeks and improper exposure to mercury. GE said it "immediately" dispatched an environmental health and safety team to the facility.