Lookup table for KELVIN and "warm white", "cool white" etc

[Urchie]

Is there a lookup table where I can match descriptions for fluorescent
lamps like "warm white", "cool white", "daylight" with the Kelvin value?

Those which I have seen seem quite poor.

 

[Andrew Gabriel]

Is there a lookup table where I can match descriptions for fluorescent
lamps like "warm white", "cool white", "daylight" with the Kelvin value?

There's no standard that I'm aware of.
Rough guide off the top of my head...

2700K Warm white (and matches filament lamps)
3500K White
4000K-4500K cool white
5000K-6000K daylight

Those which I have seen seem quite poor.

Colour Rendering Index (CRI) is also a factor.

 

[Victor Roberts]

Is there a lookup table where I can match descriptions for fluorescent
lamps like "warm white", "cool white", "daylight" with the Kelvin value?

Those which I have seen seem quite poor.

As Andrew says, there is no standard. "Warm white", etc are
more marketing terms for than technical terms, and can mean
just about anything the company wants them to mean, though I
do agree that the ranges given by Andrew are the most
common.

--
Vic Roberts
http://www.RobertsResearchInc.com
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[TKM]

Is there a lookup table where I can match descriptions for fluorescent
lamps like "warm white", "cool white", "daylight" with the Kelvin value?

Those which I have seen seem quite poor.

The GE Lighting technical publication "Specifying Light and Color" has most
of what you want. You can download it as a pdf file at:
http://www.gelighting.com/na/business_lighting/education_resources/learn_about_light/
From the table at the back of the publication, you can see the Kelvin
ratings as well as the x,y chromaticity values for most commonly-used lamps.
From there, just plot the values of interest on either the chromaticity
scale or x,y diagram. What I find more useful is to look at the spectral
distribution diagrams (also lin the publication). They show you where the
lamp has output everywhere in the visible spectrum.

Terry McGowan

 

[Mazz]

http://www.lightbulbs-direct.com/article_view.asp?ArticleID=26

Nice little chart. Gives codes for tri-phosphor fluorescents too.

There is also a 3200K available too which is another warm white. For me
(personally) 2700K is the best if trying to match a fluorescent to a
filament.

Mazz