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Author Topic: Could a fluorescent tube be made of clear glass to emit more light?  (Read 4058 times)

Offline lennie

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Can one have a clear tube and therefor more light?
« Last Edit: 13/04/2008 21:43:51 by chris »


 

Offline graham.d

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No. The definition of a fluorescent tube is that it relies on fluorescence. The discharge in the tube produces UV light which then is absorbed by the fluorescent coating and re-emitted in the visible spectrum. You can have clear discharge emissions, like a sodium light for example, but then there is no fluorescence involved.
 

Offline techmind

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No. The definition of a fluorescent tube is that it relies on fluorescence. The discharge in the tube produces UV light which then is absorbed by the fluorescent coating and re-emitted in the visible spectrum. You can have clear discharge emissions, like a sodium light for example, but then there is no fluorescence involved.

I've got a "clear" tube - it gives off a sky-blue light... and lots of ultraviolet. This is the natural colour of the (mercury) discharge. If I had more time I'd do you a nice photograph!

As Graham says, they put the white phosphor on the tube to convert that ultraviolet to visible. The visible light you see from a fluorescent tube is generated in the white coating on the inside of the glass - and is much brighter than the bluey/UV "inside" light would be.
 

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