Precautions for purchase:
Judging from three aspects:
1, the effect of LED lighting. The effect of lighting can be directly observed with the naked eye. When purchasing commercial LED downlights or LED ceiling lamps, LED track lamps for clothing, etc. Hotels, jewelry stores, clothing stores and mobile phone stores have particularly high requirements for light. How to measure, find white clothes or white walls, light the LED lamp, and pay attention to whether the center position of the light spot illuminated by the lamp is the same as the light color at the edge of the lamp. If it is the same, it means it is a good product.
2.LED lamp radiator. Heat dissipation plays a key role in the life of LED lamps. A good LED lamp needs high design and production technology to achieve the same temperature of the lamp bead and radiator. A relatively simple test is to touch the radiator with your hand. After lighting 15 minutes or half an hour, the LED lamp basically reaches a constant temperature. When the hand is placed on the radiator 10 seconds or less, it is hot. It means that this product is not very good. When you put your hands on a loose body and don't feel hot, you think this is a good product. Don't get too excited. It may be that the heat of the lamp bead is not derived. In this way, it is necessary to disassemble the PC cover of the lamp, and touch the edge of the lamp bead with your hand after unplugging the power supply, if it is very hot. It shows that this lamp is an inferior product with internal heating and external cooling.
3. the power supply of the 3.LED lamp. Power supply is like a human heart, and it is more reliable to detect with instruments. You can also visually see if there is flicker when turning on the light. This test is not very accurate, and this method is effective for some bad products.