Hello Rob :
I took noted this approx 3 years ago - Unfortunately, I no longer have a link to the site it's from - See if this helps :
"Digital Darkroon ISO Standard
Light table for viewing slides.
5000K
Ra >96
Intensity= 1400 Candela/m2.
This equals a reflected reading of 1/60 sec and f.11 at 100 ISO
Lights for viewing prints.
5000K
Ra >96
1500-2500 lux at the print.
Take a reflected reading from a white paper and it should say 1/30 sec, f.11 at 100 ISO
Room light.
32 lux in the room. Put a white paper at the screen (turn the screen of) and take you know what
that should read 1/4 sec, f.4 at 100 ISO
Use tubes that is 5000 K and Ra >96 in the ceiling.
Paint the walls gray so they equal zone VII (two stops more than Kodak’s graycard).
The screen.
If you are producing a digital original (you are not going to compare it with a print) it should be set
at 6500 K. If you are comparing the screen image with a print it should be set at 5000K.
Gamma?
It doesn’t say because the gamma you are using at your screen is included in the ICC-profile.
But for web you should use 2.2 if it is intended to be viewed in Windows and 1.8 for Mac.
The white of the screen should be 80-120 Candela/m2. Use a calculator to find out what that should be in
f-stops.
I made a mistake regarding light tables. It should be 1/60 and f.11.
ISO will recommend 5000 K för the screen when comparing to a print, but as arodney says, most profesionals
think that gives a yellow screen with not enough contrast. On a good screen 5500-6000 normally gives the
best result when you compare a white paper to the white of the screen. Assuming of course that you are using
correct 5000 K light in the room."
I'm redoing my office and want to install the correct light temp. for processing and printing. Solux makes 3500,4700,5000K lights. They suggest using the 4700K for processing,profiling. and use the 3500K for viewing the work. Why do they use two different temps? Can I process my own work and view it using all 3500K lamps? Any suggestions would be appreciated. I have been calibrating my monitor to 6500K 2.2 Gamma.
Thanks, Rob