In article . com,
AustinMN wrote:
Richard Sexton wrote:
In article ,
dc wrote:
Brian wrote in news:bsheller-FBCA59.21583610092006
:

wasn't doing too badly before. Any other advantages to CFL? Certainly,
the T-8 bulbs are cheaper. Thanks,

Compact fluorescent is more efficient and have a narrower spectrum, which
means you get more light per watt, not just higher wattage.

The phosphours, and therefore spectra are the same across all tubes.

*keyboard*

I guess the visibly different colors of different fluorescent tubes is
just an illusion?

No, it's a carfully controlled mix of phosphours. But it has noting to do with
tube size. For example warm white (2700K) is warm white in T12 or CFL. And Chroma
75 (7500K) is chroma 75 in T12 or T8. They don't make a CFL C75. But they could,
there's just no demand.

There are three major fluorescent manufacturors: GE, OSram/Sylvania and Philips.
Each tube will have a dode that tells you the size and phosphour composition. The
tube size will vary but the phosphour composition - which dictates the color of
light - can be found in many tube sizes.

Have a look at the GE website and downlaod their PDF of tubes and you'll see
much better than I can explain it here.


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