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Whats the white powder I see inside my fluorescent bulb?

bulb fluorescent powder white
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Whats the white powder I see inside my fluorescent bulb?

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The white powder that you see inside a fluorescent lamp is called phosphor, which is a substance that emits white, visible light whenever it absorbs light waves. Both compact fluorescent bulbs and fluorescent tubes contain a gas that gives off invisible light when excited by electricity. This invisible light travels to the phosphor coating on the bulb, where it is transformed into light visible to the human eye.

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