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Although the technology has existed for at least 50 years, in the 2000s was the first time that efficacy and output increased enough in LED lights to be used in applications such as car headlights. What does LED stand for?

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1. Although the technology has existed for at least 50 years, in the 2000s was the first time that efficacy and output increased enough in LED lights to be used in applications such as car headlights. What does LED stand for?





 
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