Hong Kong Consumer Council and Electrical and Mechanical Services Department (EMSC) found large disparities in energy efficiency and lifetime performances in 10 types of LED bulbs, among these included products from leading lighting brands. Differences in LED bulb efficacy reached 100%, while one sample burned out and lumen depreciation in certain products occurred at 10% mark of the product’s lifetime. A couple other products failed to pass safety tests. Consumers were advised by the council to choose LED products cautiously.