Hangzhou SIJUNSI technology Co., Ltd. isa lighting design, manufacturing and sales company, especially the LED filament lamp series! The company is located in Hangzhou, China. Near Shanghai. We have many international patents, includ the spiral filament bulb patent.The chief designer is Tiehan Ge, who has won many awards. Our products are all patent protected products and we also have a strong OEM factory. Our products have appeared all over the world. We also own the following domains: “ledfilament.com” “ledfilamentbulb.com” “ledfilamentlamp.com” As a new lighting material, when LED is made into filament, it brings infinite imagination to modern lighting. It is the perfect combination of art and technology!
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