See the overall "power factor of lamps": low power factor, indicating the use of the drive power, circuit design is not good, will greatly reduce the service life of lighting! Low power factor, the use of no matter how good lamp life of the lamp will not be long. The level of power factor, with the "power factor meter" can be detected! General export LED panel lamp power factor requirements of 0.85 or more. Power factor below 0.5, it should be said substandard products or refuse products, not only short life expectancy, and the actual consumption of electricity than the nominal twice as high, that is, compared with the ordinary energy-saving lamps, there is no power-saving! Therefore, this is why LED panel lights need to be equipped with high-quality and high-efficiency driving power! There is no "power factor meter" to test the LED lighting power factor of consumers, there is a way to use "ammeter" to detect two A similar product with the same nominal power, the greater the current and the greater the current harmonics, indicating that the actual power consumption is large, the more energy-efficient! At the same time, the current instability, the life of the lamp and the overall life of the lighting adverse.