Hong Kong team develops the most energy-efficient LED filament lamps

This LED filament technology has excellent energy

a

efficiency. Based on the assumption of a daily operation of eight hours, a PolyU's LED filament bulb with lumen of 1300lm costs HK$33 of electricity tariff per year, and contributes to 22kg of carbon dioxide emission yearly. In comparison, a traditional LED lamp costs HK$47 of electricity tariff and 31kg of carbon dioxide emission yearly with the same lumen and conditions, which means that the new technology can reduce carbon dioxide emission by 30%. Besides, the new technology enables an expected lifetime of 50,000 hours, with only half of the production cost of traditional LED lamps.

Thanks to its energy-saving and long lifetime features, LED lighting contributes significantly to sustainable development. However, the limitations of traditional LED lamps, including high production cost and narrow beam angle have affected its popularity. The LED filament technology developed by PolyU has not only achieved breakthrough in the areas of energy efficiency, lifetime, and production cost, but it also has other advantages including:

1. Wide beam angle: 300-degree, parallels to that of incandescent bulb;

2. Comparably high colour rendering index (CRI): Enables original colour projection of objects as if they are in natural light;

3. Less UV light emission; and

4. More environmental friendly: Absence of harmful chemicals, and consists of less electronic components, and 80% of recyclable materials.

Read more at: https://phys.org/news/2017-03-hong-kong-team-energy-efficient-filament.html#jCp