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Pay attentions to select LED

Before we lelect LED,we have to make basic knows for LED,such as the following points, maybe can help you to options.
1, LED brightness (MCD) is different, the price is different. The LED used for LED lamps should conform to the laser class I standard.
2, LED with strong antistatic ability and strong antistatic ability, long life and high price. Usually, LED with an electrostatic strength greater than 700V can be used for LED lighting.
3. LED with the same wavelength has the same color. If the requirement is uniform, the price is high. It is difficult for manufacturers without LED spectrometers to produce pure color products.
4, The leakage current LED is a unidirectional conductive luminous body. If there is a countercurrent, it is called leakage current, LED with large leakage current, short life and low price.
5, The angle of luminescence is different from that of LED, and its luminous angle is different. Special luminescence angle, the price is high. Such as all diffuse angle, the price is high.
6, The key to life quality is life expectancy, and life is determined by light decay. Low light failure, long life, long life and high price.
7, The chip LED's luminous body is wafer, different wafers, the price difference is very big. The chips in Japan and the US are more expensive, and the prices of chips in Taiwan and China are lower than those in Japan and the United States (CREE).
8, Chip size and chip size are represented by side length. The quality of large chip LED is better than that of small chips. The price of the crystal is proportional to the size of the crystal.
9, Colloid ordinary LED colloid is generally epoxy resin, with anti ultraviolet and fire-resistant LED price is more expensive, high quality outdoor LED lighting should resist ultraviolet and fire protection. Each product will have different designs and different designs are suitable for different uses. The reliability design of LED lighting includes electrical safety, fire safety, environmental safety, mechanical safety, health and safety, safe use time and other factors. From the point of view of electrical safety, it should comply with relevant international and national standards.