Hong Kong scientists are claiming an efficacy of 129lm/W from an led ‘filament’ light bulb, claiming it to be the most energy-efficient led filament technology. Researchers came from State Key Laboratory of Ultra-precision Machining Technology and the Hong Kong Polytechnic University (PolyU), working with a 2015 grant of HK$100,000 (increased to $120,000 since 2016) from the ...
Read full article: Most efficient led filament lamp yet claimed
from Electronics Weekly http://www.electronicsweekly.com/blogs/led-luminaries/efficient-led-filament-lamp-yet-claimed-2017-03/
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