1, look at the packaging and trademarks. National mandatory LED lamp manufacturers in product packaging marked with the following: rated voltage, the voltage range, rated power, rated frequency. Generally speaking, the trademark printing quality of quality products, mark clear, with a soft damp cloth is not easy to erase, and manufacturers of the trademark and related certification mark.
2, look at the lamp appearance. The appearance should be no cracks, loose and interfaces to be pried traces. In the installation, disassembly process, lamp should not be loose or Waitoushan phenomenon. Plastic shell lamp must choose plastic flame retardant that project, is characterized by its surface similar to frosted glass texture. While the ordinary plastic surface is smooth, shiny, but easy to deformation and flammable, is prohibited for energy-saving lamp production.
3, see the working state. LED lamp under normal working condition, the temperature rise should be low, if the heat condition is not good, lamp work under high temperature, light attenuation will greatly, the service life of the lamp will be greatly reduced. At the same time, the lighting in the light and closed, if rapid flashing, also shows that there are quality problems.
4, listen to the voice work. Electromagnetic compatibility is appliances must pass project, must be in the LED lighting product packaging is printed on the national symbol of electromagnetic compatibility testing. We can also through a small test to simple judgment, with a short wave radio, when the lights work, put the radio on the nearby radio received noise is low, the better description of electromagnetic compatibility measured lamp. In the quiet environment to hear LED lamp work sound, if the lamp work sounds very clearly heard, that the lamp power is not very good.