Re: Cheap 5000K lamps

["Gary L. Hunt" <glh@srv.net>]

Thanks for the information.  Somehow the more I know the less I
understand, since this kind of sounds like any of several different
color temperatures could be used for evaluation of prints, depending
on what you were evaluating them for.  In my case, I'm trying to 
compare them to the image on my monitor (which I know is never
going to work perfectly, but it's all I have for comparison.)  The
problem is further complicated, of course, by the fact that illuminating
the prints raises the light level around the monitor and makes it
harder to judge the colors on it.  Is this a lost cause?

Gary Hunt <glh@srv.net>

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At 08:05 AM 12/24/1999 -0500, J. Arthur Davis wrote:
>Here is some information on the proper viewing lamps for your work.
>
> The choice of a specific daylight source and custom fluorescent should
>be made based on the standard governing your industry or application:
>
> Choosing the Right Daylight Source
>
>      D75 North Sky Daylight at 7500K is used for visual evaluation of
>opaque materials as outlined by ASTM D1729. 
>      D65 Average North Sky Daylight at 6500K is used to provide visual
>correlation with spectrophotometric readings or in conformance with
>European or Japanese standards. 
>      D50 Noon Sky Daylight at 5000K is used for the evaluation of color
>quality and uniformity in conformance with ANSI and ISO specifications
>governing the graphic arts. 


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