The Hong Kong Polytechnic University announced on the 8th that the school's state key laboratories and student research teams of ultra-precision machining technology have successfully developed more power-saving LED (light-emitting diode) filament technology, which has a luminous efficiency of about 1.5 times that of a traditional LED lamp, Than the current common lighting products on the market more energy. According to reports, calculated using 8 hours a day, this filament lamp electricity costs only 33 Hong Kong dollars a year, carbon emissions of 22 kg CO2e. With the same luminosity and same operating time, the traditional LED lamp has an annual electricity cost of HK $ 47 and a carbon emission of 31 kg CO2e. Therefore, the new technology can reduce carbon emissions by 30%. In addition, Hong Kong Polytechnic University LED filament lamp life expectancy of 50,000 hours, and the cost of production is only half the traditional LED lights. In addition to breakthroughs in energy efficiency, longevity and production costs, the researchers pointed out that other advantages of LED filament technology developed by PolyU also include: wide lighting angle and the same coverage as tungsten filament bulb of 300 degrees; high color rendering index , The color rendering index close to daylight makes the subject as if under natural light; low UV light emission; no harmful chemicals, less electronic components, and up to 80% recyclable material. According to reports, PolyU Micro-Fund allocated HK $ 100,000 to the student team for this study in 2015 and the team expects the product to be launched this year.