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The new technology of road lighting: LED Street Light

At present, the Led street light source used in road lighting mainly to high pressure sodium lamp, the light source of the initial luminous efficiency over 100lm / W luminous efficiency of high-power LED devices on the market about 90-100lm / W, slightly lower than the high-pressure sodium lamp....
https://wp.me/p2Z1Hg-jHc

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