LED lamps high cost - effective?

　　Ordinary incandescent and energy-saving lamps, LED lamps biggest difference is in the light principle. Heat generated by incandescent tungsten light, only 5% in the use of electricity for lighting, the remaining 95% of the total calories consumed by the ordinary energy-saving lamps are able to 80% of the electrical energy into light energy. The LED light by light emitting diodes, can be converted directly into electricity to light, and lower power consumption. In theory, the LED power consumption is only one-tenth of incandescent, ordinary energy-saving lamps to the third quarter.

　　With 3W LED lamps, for example (in accordance with the market price of 30 dollars), control brightness equivalent 12W ordinary energy-saving lamps (about 15 yuan), eight hours a day if the lighting, the use of LED lights will save 0.072 kWh a year down to save 26.28 degrees, according to 0.48 yuan / kWh of electricity units can save electricity around 12.6 yuan, more than a year can be the initial purchase price difference, "filled." Meanwhile, LED light than ordinary energy-saving lamps "service" for longer - the most mainstream of ordinary energy-saving lamps Philips label slogan is "life of up to three years." LED lamp life is generally qualified products in more than 10 years and even 20 years, this calculation, 10 years, LED lights can last use, and general energy-saving lamps may have replaced about three times. Combines the benefits of a long life and low energy consumption, long-term use for families, LED lights is more cost-effective than conventional energy-saving lamps.