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File:Light bulb icon.svg - Wikipedia
LED lamp - Wikipedia
File:LED light bulb.jpg - Wikimedia Commons
Light: Incandescent Electric Light System
Wikipedia - On this day in 1880, Thomas Edison received the patent for his incandescent lamp, an early version of the electric light bulb. At the time of Edison's invention, other versions
LED lamp - Wikipedia
Incandescent light bulb - Wikipedia
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LED lamp - Wikipedia
LED lamp - Simple English Wikipedia, the free encyclopedia