The big promotion of energy-saving light means bringing the light to millions of families, and also spreading the “mercury pollution” cause to each family. Now we finally have a perfect replacement – led high bay , which can truly realize saving energy and free of pollution. It can also be light up immediately driven by direct current without worrying about bulb explosion due to large current. The technology of LED Lights can absolutely enable them to be applied to civilized area. The only problem is the slightly higher prices. They are sharing certain part of the market and will be the perfect replacement. They will not be replaced since they have many advantages beyond incandescent lights.