LED is based on the lighting passport issued by EOS main network, with a total circulation of 1 billion yuan and a real circulation of 20 million yuan. It is a de-centralized digital passport. In the future, LED can be used to pay for lighting products. At present, it is the first technology application of energy-saving lighting industry in the block chain in the world. It combines the technical characteristics such as unalterable, makes the energy-saving lighting industry chain realize the information consensus of upstream, middle and downstream, and creates a digital passport combining the real economy of energy-saving lighting with the assets of block chain.