Electrical Business

PolyU develops 129lm/W LED filament lamps

March 14, 2017
By Anthony Capkun

March 14, 2017 – A research team of State Key Laboratory of Ultra-precision Machining Technology (partner laboratory in The Hong Kong Polytechnic University) and PolyU students boasts it has developed “the most energy-efficient [LED] filament technology, with a luminous efficacy of 129lm/W”.

According to the team, this represents 1.5x the efficacy of traditional LED lamps, while its wide beam angle parallels that of an incandescent. They cite several advancements that led to their breakthrough, including:

• Aluminum as the substrate material.

• Mounting LED chips of small power on both sides of substrate. In the PolyU LED filament lamp, LED chips consuming large amounts of power are replaced with numerous tiny LED chips—mounted on both sides of the substrate—that consume less power.


• Advanced injection-moulding technology.

• AC to DC power conversion that reduces the components required, simplifying circuitry.

A patent has been filed for the new technology, and the prototype design completed. The team will conduct various tests and obtain certifications for market launch.

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