LED (Light Emitting Diode), emitting diode, is a semiconductor device that can convert electrical energy into visible light. It can directly convert electricity into light. The heart of LED is a semiconductor chip. One end of the chip is attached to a bracket, one end is the negative electrode, and the other end connects the positive pole of the power supply, so that the entire chip is encapsulated by epoxy resin. Do you need to pay attention to these points?

1. Be careful of low -cost traps. The price of LED light sources is very different. LEDs with the same color and brightness can be several times the price. This gap is mainly reflected in the reliability of LED and the performance of light failure and appearance technology. LEDs with low prices are small in size and rough electrodes. The materials (fluorescent powder and glue) used are poor, the current resistance is poor, the temperature and humidity change are poor, the light is fast, and the life span may be lost.

2. Recognize the relevant standards. From the perspective of security, the product should meet the relevant international and national standards. Since LED is a new product, China's national standards lag behind, and only provide product qualification tests. Therefore, international security certification (such as GS, CE, UL, etc.) is the standard for measuring the quality of LED lights. At the same time, there are not many manufacturers with international security certification and national product quality qualification certificates. When purchasing, you need to carefully identify the authenticity of the certificate. Products with international security certification are generally high.

3. LED lights with constant current power supply, the price of resistance, capacitors, ICs and other components of LED -driven power supply is very different. The scheme and rationality of the entire power supply and line itself will directly affect the quality of the product. Some drivers are only constant voltage and do not achieve constant current, and LED lights must be constant flow to better ensure quality and service life. Therefore, this requires additional attention when purchasing, especially for high -power LED lights.