No.2 Sand
Due to the popularity of high-power LEDs, it has become an industry development trend to use single or several LEDs as light sources, Fresnel lenses and microarray lenses with single LED light sources instead of multiple LEDs as light sources to form traffic lights. It has been put into use in many countries around the world.
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Due to the popularity of high-power LEDs, it has become an industry development trend to use single or several LEDs as light sources, Fresnel lenses and microarray lenses with single LED light sources instead of multiple LEDs as light sources to form traffic lights. It has been put into use in many countries around the world.
Fresnel lens has the advantages of ultra-thin structure, super-large size, ultra-light weight, arbitrary shape cutting, excellent light transmittance, low price, light and easy to carry, etc.
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