The power factor is very important factor, because the high power factor can reduce the loss of the distribution network. Reduce the use of electricity to the environmental impact of the most effective way to reduce waste, and regulatory agencies around the world are further strict power factor specification. One example is the Energy Star solid-state household led light bulbs lighting energy efficiency specifications (09/12/07), which provides residential lighting products, power factor (PF) should be greater than 0.7, commercial lighting products, power factor (PF) should be greater than 0.9.
LED light bulbs and lighting manufacturers are to respond to these demands, they want their products with the highest possible versatility. Therefore, they are very compatible with a variety of dimmers LED driver circuit, high efficiency and power factor of 0.9 or above. Household led light bulbs by the III – IV compounds such as GaAs (gallium arsenide), GaP (gallium phosphide) semiconductor GaAsP (GaAsP), made the core of the PN junction. It has IN general PN junction characteristics, the forward pass, reverse cut-off, breakdown characteristics. In addition, under certain conditions, it also has optical properties. Forward voltage, the electron from the N region into the P region, and holes from the P region into the N region. Go to the other region of minority carriers (minority) part with the majority carrier (multiple) composite and shine.Known as the led high bay source for the longevity lights. For the cold light of the solid epoxy resin, light body and no loose parts, there is no filament light easy to burn, heat deposition, the light fades and other shortcomings in the proper current and voltage, the service life of up to 60000-10 million hours, more than 10 times longer life than traditional light sources.