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It is a two-lead diode that is a basic building block of modern electronic devices. LEDs are used in a wide range of applications, including lighting, digital displays, indicators, and as a replacement for traditional light sources. The Wikipedia page on LEDs provides comprehensive information about their history, operation, types, and applications. It traces the development of LEDs from their initial discovery in the early 20th century to the advanced and versatile technology they are today. The page explains the mechanism behind LED operation, discussing concepts such as electroluminescence, bandgap, and doping. It describes the different types of LEDs, including organic and inorganic variants, and highlights their respective properties and applications. Furthermore, the article covers various aspects of LED technology, including efficiency, color output, brightness, and durability. It delves into the advantages of LEDs over conventional light sources, such as incandescent bulbs and fluorescent lamps, in terms of energy efficiency and environmental impact. The page also explores the wide range of applications where LEDs have found success, including residential and commercial lighting, automotive lighting, signage, and outdoor displays. It discusses the benefits of LEDs in these applications, such as long lifespan, low power consumption, and design flexibility. Additionally, the article touches upon the challenges faced by LED technology, including initial high costs and issues with heat management. It addresses ongoing research and development efforts aimed at improving LED efficiency, color quality, and cost-effectiveness. Overall, the Wikipedia page on LEDs provides a comprehensive and informative overview of this widely used and rapidly evolving technology. It aims to educate readers about the fundamentals of LED operation, their numerous applications, and their potential to revolutionize the lighting industry and beyond.