How to simply judge the quality of the LED light tube: 　　 1. Choose from the appearance. The appearance of the LED light tube is exquisitely shiny, and the product trademark, model, and specifications are clearly and beautifully printed, and there should be no deformation, paint, uneven color, etc. 2. The LED light tube usually uses aluminum as the radiator. The larger the contact area between the radiator and the air, the better, which is conducive to heat dissipation, the whole lamp works stably, the light decay is small, and the life is long. Plastic tube, poor heat dissipation, large lamp bead decay, short service life, affect the lighting effect or cause unnecessary damage.　　3. If the LED light tube shines on a white wall, there should be no obvious color temperature errors such as color spots and color circles. If there are such phenomena, it means that the lamp beads are poorly consistent and the light source is inferior. 4. When the LED light tube is turned on, there is a time difference between a few tenths to two seconds between the power on and the light emitting, which is a normal phenomenon. Usually the lamp is driven by a constant current source with an IC integrated circuit, and its steady current and voltage stabilization The performance is relatively good and the work is stable.　　5. Do not heat the lamp body of the LED light tube too high or unevenly when working. If there is such a phenomenon, it indicates that there is a problem with the design or manufacturing process of the lamp, and the light decay is large and easy to damage.　　6. Due to the high brightness of the LED tube, it is difficult to judge the brightness of the two brands of the same type of lamp under the same conditions by looking at the eyes directly, and it is also easy to damage the eyesight. Usually we recommend to cover the light source with a piece of white paper, and compare the light after attenuating the light through the white paper, so that it is easier to see the brightness difference of the lights, the higher the brightness, the better. In addition, it is preferable that the color temperature is closer to the color of sunlight. 7. If time permits, you can compare the brightness of two lamps of the same specification, and then light one of them continuously for a week, and then compare the brightness with the previous comparison lamp, if it is not significantly dimmed , Which means that the light attenuation is small, and the quality of the light source is better. 8. For the multi-chip products of the LED light tube, you can remove the cover to see the lamp beads. You can see the lamp bead light source and close your eyes and turn on the power to light up. Then turn off the power and open your eyes and you will see the lamp bead chip. If the afterglow disappears time error is too large, it means that the quality of the lamp bead chip is uneven, or the quality of the lamp bead chip is inferior. The whole lamp is easily damaged and has a short life span, so do not buy it. 9. When the LED light tube is working, when there are refrigerators, air conditioners, water heaters and other high-power appliances around it, there should be no changes in brightness and darkness. If there is such a phenomenon, it means that the driving power of the LED light tube is not constant current or Constant voltage, this has a certain impact on the life of the lamp.