Hong Kong inventor develops LED bulb that's cheaper, brighter and longer-lasting | South China Morning Post
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The History of the Light Bulb | Department of Energy
Inventing the LED Lightbulb - The Atlantic
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Smartbulb switches to rechargeable battery in a power cut | Daily Mail Online
Nick Holonyak - Wikipedia
History of the Light Bulb | Lighting Basics | Bulbs.com
Nobel Prize in Physics Awarded for Invention of New Light Source - WSJ
