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How to buy LED lights?

1, LED brightness (MCD) is different from the price difference. LED light for laser level should be consistent with class Ⅰ criteria.
2, the antistatic ability of anti-static ability of the LED, long life, and therefore higher prices. The LED is usually static than 700V can be used for LED light.
3, the same wavelength LED, and color, such as requiring the same color, the price is high. No LED spectral separation device manufacturer of products difficult to produce pure colors.
4, the leakage current
LED is one-way conductive light, if there is reverse current is called leakage, leakage current is large LED, short life, low prices.
5, uses a different angle LED light emitting angle is not the same. Special light-emitting angle, and higher prices. If all diffusion angle, and higher prices.
6, the key to life is the life of different quality, life determined by the light failure. Lumen, long life, high price.
7, the chip
LED's light to the chip, different chips, prices vary widely. Japan, the United States more expensive chips, the chips made in Taiwan and the general prices are lower than Japan and the U.S. (CREE).
8, the size of the chip size of the chip to the side of that great quality of LED chips are better than small chips. The chip size is proportional to the same price.
9 LED ordinary colloidal gel is generally epoxy resin, plus a UV LED and fire agents more expensive, high quality outdoor LED lighting should be UV and fire. Each product will have different designs, different designs for different uses, LED lighting design reliability include: electrical safety, fire safety, for environmental safety, machinery safety, health and safety, safe use of time and other factors. From the electrical safety point of view, should be consistent with relevant international, national standards.
Because LED is a new product, China lags behind the national standard, but the state qualified to provide product testing. With international safety certification (such as GS, CE, UL, etc.) and the national product quality certification of LED light is higher prices, because these products in the security design is reliable. Consumers to pay attention is to carefully identify the authenticity of the certificate, there is now international and national product safety certification certificates are not many manufacturers.
From health, the use of toxic materials, the prices of products designed to be high, especially in interior LED light, do not be cheap used odor of LED light, LED manufacturers are currently only a few non-toxic material is produced, to identify ways to directly with the nose respectively, the smell of the products at lower prices than those without a lot of odor. Like lead, mercury, cadmium and other toxins to be professional analysis. From the application of environmental security perspective, a reliable dust-proof design, materials, fire prevention, anti-UV, anti-low-temperature cracking of the high price of LED products.

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