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by HungryGuy on August 27th, 2004

HungryGuy

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How do you make a light bulb?

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  • by zeropointburn on April 21st, 2005

    zeropointburn

    For fluorescent bulbs, the process is similar.
    A tube of glass is coated inside with a phosphorescent material, then capped on both ends with ballast (capacitance and arc discharge unit). The air is evacuated from the tube, and a small amount of argon and mercury vapor is injected. The bulb is sealed, the ballast charges, the gas ionizes, the mercury releases UV, which excites the phosphor, which produces white light.
    Many of the tools and materials needed to make fluorescent tubes are also useful for making UV lasers.

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