So I spend a long time trying to calibrate my monitor to the results I am getting from professional printing labs, mainly Whitewall in Germany. I illuminate the prints with a 50 watt tungsten bulb from 1-2 m distance, my set-up in my house for many rooms. Somme rooms have a wooden ceiling.
In winter, little extra light comes into the corner where the print hangs, now, in spring it is a bit more, therefore I waited with this post.
In spring, now, calibrating my screen to 5500k and 90cd gives a good match from screen to print, 6000K is still not bad. But everything above is not good. In winter 5000k is not low enought, but my Spyder 3 would not allow calibrating to 4000k. I tried it manually and it looked good.
I only have a simple LCD screen, in fact I tried a Dell and an Acer. They just so pass the SRGB triangle, it gets better with lower color temperature settings.
So at least I am done. As said before, I also have a lot of screens hanging at my walls. It is difficult to calibrate a TV screen to 5000K, 6500k seems to be "warm", some makers seem to set neutral to 9500K which people then find " brilliant". So I end up making two sets of outputs: One for TV-screens, adjusting my computer screen to 6500K and making pleasing adjustments on my photos for that. And one for print. I look at prints mainly in wintertime, so I set the white point low.... Two outputs are fine, just as in old times: Slides were for projection and negatives for printing...