1. Look at the packaging and trademarks: The state mandates that LED lamp manufacturers mark the following on the outer packaging of their products: rated voltage, voltage range, rated power, and rated frequency. Generally speaking, the trademarks of high-quality products have good printing quality, clear fonts, and are not easy to fall off. They can be wiped with a soft wet cloth. The logos are clearly legible and not easy to be wiped off. They have the manufacturer's trademark and related certification marks. Counterfeit products have poor printing quality, blurred fonts, easy erasure, and no manufacturer's trademark and related certification marks. 2. Look at the appearance of LED lamp tubes: 1. Real LED energy-saving lamps use three primary color tubes. The tubes are white. If you cover them with your hands, they will become whiter. In addition, from the perspective of lamp tubes, multiple lamps can be compared together. Lamp tubes with better shape and size consistency are mostly machine-bent and formed, and are mostly mass-produced products. The consistency of the product is good, the quality is easier to ensure, and the interchangeability during maintenance is better. Of course, there should be no cracks, looseness, or signs of prying between the interfaces. During the installation and disassembly process, the lamp head should not be loose or tilted. 2. The plastic shell of the lamp must be made of engineering plastic flame retardant. Ordinary plastics are easily deformed and flammable, and are prohibited from being used in the production of energy-saving lamps. The two can be easily distinguished from the surface. The latter has a smoother and glossier surface, while the former has a texture similar to frosted glass. 3. Look at the working temperature: Under normal working conditions, the temperature rise of LED energy-saving lamps should be very low. Otherwise, the life of LED energy-saving lamps is very short. At the same time, if the energy-saving lamp flashes very quickly or dazzles when it is lit, it indicates that there is a quality problem with the energy-saving lamp. 4. Look at the starting performance: LED energy-saving lamps have two characteristics when starting: first, the higher the temperature, the easier it is to start; second, when the light is turned off, it will not flash. In addition, it is worth mentioning that many LED energy-saving lamps are very dim when turned on, which is detrimental to the life of the bulb. LED energy-saving lamps should have a power circuit and PCB board inside them. 55. Check the interference situation: In our country, electromagnetic compatibility is an item that electrical appliances must pass. However, the detection of this item is very complicated. When users purchase lamps, they first check whether there is a mark on the package that has passed the national electromagnetic compatibility test. Secondly, Bring a medium- and short-wave radio. When the lamp is working, place the radio nearby. The radio should have medium- and short-wave radio. The lower the noise emitted from the radio station, the better the electromagnetic compatibility of the lamp under test.