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2 x LIGHT BULBS 6 volt 21 watt dual filament small globe rear+brake stop n tail | eBay
Electrical filament - Simple English Wikipedia, the free encyclopedia
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/https://www.thestar.com/content/dam/thestar/business/tech_news/2018/01/08/how-new-lightbulb-technology-is-helping-led-appeal-to-the-masses/edison.jpg "How new lightbulb technology is helping LED appeal to the masses | The Star")
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What is the filament of a light bulb made of? - Quora
Electrical filament - Simple English Wikipedia, the free encyclopedia
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Carbon-filament lamp, a sample of the element Carbon in the Periodic Table
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