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Author Topic: Can you get coloured compact fluorescent light-bulbs (CFLs)?  (Read 9981 times)

Offline chris

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I've only ever seen white compact fluorescents; but can you get coloured ones? Also, coloured strip lights aren't common are they? So is it difficult to make phosphor mixes that will produce satisfactory coloured light outputs?


 

Offline AllenG

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Can you get coloured compact fluorescent light-bulbs (CFLs)?
« Reply #1 on: 24/12/2009 04:54:46 »
Yes. The glass is tinted the same as with colored incandescent lights.
With light strips I believe gels are the most common way to tint the light.

« Last Edit: 24/12/2009 04:56:20 by AllenG »
 

Offline chris

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Can you get coloured compact fluorescent light-bulbs (CFLs)?
« Reply #2 on: 24/12/2009 09:04:13 »
Wow - how's that for a fast service! Thanks AllenG!
 

Offline Mazurka

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Can you get coloured compact fluorescent light-bulbs (CFLs)?
« Reply #3 on: 24/12/2009 11:24:11 »
Forget CFL's LED's are the future - Whatever colour combination you like and even more efficient...
 

Offline durrenmatt

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Can you get coloured compact fluorescent light-bulbs (CFLs)?
« Reply #4 on: 19/01/2010 16:16:49 »
Forget CFL's LED's are the future - Whatever colour combination you like and even more efficient...

I agree. LED lights offer much brighter colors, they look better, and they save you a lot of power!
 

Offline RD

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Can you get coloured compact fluorescent light-bulbs (CFLs)?
« Reply #5 on: 19/01/2010 18:20:54 »
I've only ever seen white compact fluorescents; but can you get coloured ones? Also, coloured strip lights aren't common are they?
So is it difficult to make phosphor mixes that will produce satisfactory coloured light outputs?

Even the "white" ones are subtly coloured, some have a cold blue tint (in my experience the cheapo ones),
 others have a warm orange tint to mimic the spectrum of 60/100Watt incandescent bulbs.


http://web.ncf.ca/jim/misc/cfl/
« Last Edit: 19/01/2010 18:30:46 by RD »
 

Offline SeanB

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Can you get coloured compact fluorescent light-bulbs (CFLs)?
« Reply #6 on: 19/01/2010 18:54:31 »
Your "White" CFL lamp uses a combination of different rare earth oxides ( which are almost invariably a greyish white colour when viewed normally)  in a thin film on the inside of a glass tube. The UV light provided by the mercury vapour discharge inside the tube excites the phosphors to provide various colours of light, and this mixed colours is perceived by you as "white" light.

To make colours you merely vary the proportions of the oxides, and use a coloured glass to enhance the output in specific colours. A naked mercury vapour discharge is almost entirely in the UV wavelengths for a low pressure, and has a green light at medium pressure.

Strange that the mercury vapour lamps are being phased out " because they contains mercury", whilst the replacement lamps contain mercury still, as well as metals that are a lot more toxic, and have a lot shorter lifetime. Tossing a mature technology, with a proven 30 plus year lifetime on the lamps, for a replacement that invariably fails within 3 years, often explosively, is not a very good idea unless you are in the supply business.

 

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Can you get coloured compact fluorescent light-bulbs (CFLs)?
« Reply #6 on: 19/01/2010 18:54:31 »

 

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