New Type Edison" incandescent lamp | National Museum of American History
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LED Filament Lamps: How Vintage Style LED Edison Bulbs Work
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Filament lamp | electronic device | Britannica
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Electrical filament - Simple English Wikipedia, the free encyclopedia
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Carbon Filament Incandescent Lamp | Sargent Welch
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Incandescent lamps, explained by RP Photonics Encyclopedia; thermal emission, luminous efficacy, energy efficiency