According to the latest report from United States Department of Energy (DOE), in the past two years, the installation of LED lamp in United States increased 10-fold from 4.5 million units in 2010 to 49 million units in 2012, it is estimated that $ 675 million can be saved in energy costs every year. By 2030, LED lighting is expected to account for 75% of the total lighting sales, the saved energy can be provided for 26 million American families. Ernest Moniz, Minister of DOE, said that the efficient lighting industry not only can save money for consumers, but also ...