Eight major items to buy small points, the secret of buying LED lights
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1. Brightness LED light brightness includes:
Luminance L: Luminous flux of the illuminant in a unit area of ​​a solid angle unit in a specific direction. Unit: Nitta (cd/m2).
Luminous flux φ: the sum of the amount of light emitted by the illuminator per second. Unit: Lumen (Lm), which indicates how much the illuminant emits light, and the more the illuminance, the larger the lumen number.
Then: the larger the lumen number, the more the luminous flux, the higher the brightness of the lamp.
2, the wavelength of the LED <br> <br> same wavelength, the same color. It is difficult for manufacturers without LED spectrophotometers to produce pure color products.
3, the color temperature is the color temperature <br> <br> light color identification unit of measure, expressed as a K value. The yellow light is "below 3300k", the white light is "5300k or more", and the intermediate color is "3300k-5300k". Customers can choose the right color temperature source according to their personal preferences, application environment and lighting effects and atmosphere.
4. Leakage current LED is a unidirectional conductive illuminator. If there is reverse current, it is called leakage, and LED with large leakage current has short life.
5, strong antistatic ability <br> <br> antistatic ability LED, long life, and therefore higher prices. Generally, LEDs with an antistatic greater than 700V can be used for LED lighting (lighting decoration renderings).
6, different quality of life <br> <br> is critical, life determined by the light fades. Low light decay and long life.
7, Design <br> <br> each product will have different designs, different designs for different uses, LED lighting design reliability include: electrical safety, fire safety, for the environment safety, mechanical safety, Health, safety, safe use time and other factors.
8, energy labeling <br> <br> energy labeling is to provide energy consumption and efficiency information for consumers, the convenience of consumers to buy energy efficient products.
EU energy label The EU divides the energy efficiency of products into 7 grades. The products with A grade have the highest energy efficiency and the G grade is the lowest.
China Energy Efficiency Label China's energy efficiency label is a blue and white background color logo, divided into 5 levels, the meaning of each level:
Level 1: The product reaches the international advanced level, the most energy-saving, that is, the lowest energy consumption;
Level 2: Compare power saving;
Level 3: The energy efficiency of the product is the average level of the Chinese market;
Level 4: Product energy efficiency is lower than the market average;
Level 5: Market access standards (products below this level are not allowed to be produced and sold). 
