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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. Choosing the Right Custom Fluorescent TL84 at 4100K is a commercial narrow band fluorescent used in Europe Ultralume 30 (U30) at 3000K is a commercial narrow band fluorescent used in the U.S. You can get additional information at http://www.greytagmacbeth.com Have a happy holiday season. Jim Davis mailto:firstname.lastname@example.org "Gary L. Hunt" wrote: > > At 10:23 PM 12/23/1999 -0600, SRJ wrote: > >.....<SNIP> > >Note the suffix SPX50. This is a high-efficiency tri-color phosphor. You > >should be able to get tubes with this phosphor. If you can't, a C50 (Chroma > >50) suffix will also give you a 5000K light, but at lower output since the > >phosphor is not that efficient. > > This point raises a question--what's a reasonable light level for print > viewing? > I just remembered I had an illumination meter, so I checked the level at my > computer-area-now-converted-to-5000K-lamps. I'm reading about 600 lux > down at the keyboard level where I usually hold prints for viewing. It isn't > quite as bright as my darkroom (which runs about 850 lux at countertop > level), but it seems pretty bright. Are there standards for this for graphic > arts or some related area? > > Gary Hunt <email@example.com> > > - > Turn off HTML mail features. Keep quoted material short. Use accurate > subject lines. http://www.leben.com/lists for list instructions. - Turn off HTML mail features. Keep quoted material short. Use accurate subject lines. http://www.leben.com/lists for list instructions.
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