Re: Re[2]: Lighting question: Illuminance? (RWCM)
Re: Re[2]: Lighting question: Illuminance? (RWCM)
- Subject: Re: Re[2]: Lighting question: Illuminance? (RWCM)
- From: Chris Murphy <email@hidden>
- Date: Wed, 4 Feb 2004 16:18:55 -0700
On Feb 3, 2004, at 5:36 AM, Peter Karp wrote:
I understand this demand, but my question also pointed to the ambient
light which does not light the proof. I meant the general "room
lights".
When I understand you correct you suggest an ambient light of something
like 64 lux, but not a specific ratio of the proof light to the ambient
(room) light?
Actually it's ISO 3664 that suggests 64 lux as a maximum. We don't have
a specifically recommended ratio between proof lighting and ambient
lighting, but I think there's merit in exploring something like this.
Anything that can be done to improve consistency is better than
inconsistency, as we'll obviously adapt to such a situation much more
quickly.
The illuminance of the proof and the luminance of the
display should match of course, but that still leaves much room for
choosen illuminance level of the ambient light.
Yeah I guess the point is that even though there is a specification for
this, ISO 3664, we question how practical it is for most organizations
to follow it. Standards are in various states of flux that can make
them very useful goals, with high percent of practicality such as ISO
15930 which applies to the various PDF/X formats/workflows; and others
that are moderately useful piecemeal with a lower percent of
practicality. I think it's better to have something like ISO 3664
published and available for scrutiny and improvement rather than not
have it at all. But it also needs to be taken in larger context of
applying it to daily work.
And nowadays TFT's can be
significant brighter in comparison to CRT's. I hope that high
brightness
displays, covering a big gamut, will be available in the not too far
future also :-)
Too much brightness comes at a cost though. Even though new displays
today have a much higher brightness, they're also going to see a larger
drop as they age if driven that way all the time. In a way they need to
get even brighter more so that we can drive them at a lower brightness
and have room to bump it up as the display ages, rather than to get
them closer to the equivalent of 500 lux or 2000 lux viewing
conditions.
Chris Murphy
Color Remedies (TM)
www.colorremedies.com/realworldcolor
---------------------------------------------------------
Co-author "Real World Color Management"
Published by PeachPit Press (ISBN 0-201-77340-6)
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