In my case I am a programmer working with two monitor set up, mostly doing coding and occasionally viewing images. I do not print images, and I just want to pick a good white point for viewing code/websites/occasional on-screen images.
I have a room with a curtain where I get ambient indirect diffused sunlight (measured white point as
x = 0.289 +/- 0.004, y = 0.339 +/- 0.002)
My goal is to match both monitors to the same white point and to enjoy color-calibrated displays for my work.
Namely in my case I want to pick a white point, but which one do I pick? Do I go with D65, or do I go with the measured ambient white point (i.e. values as above).
If the answer is "it depends", can you suggest other variables I need to consider.
I can also go with Native white point (which I estimate is around 8000K with a bit of a color-shift, something like x = .293, y = .294 when I measured it last)
My monitors are LED Acer S240HL
Note on custom RGB controls
During calibration I can choose to adjust my display's native RGB controls to match desired white point.
To achieve D65, I need to adjust monitor RGB controls to
99, 100, 85.
For ambient light in the room as white point I have to adjust RGB controls to
74, 100, 83.
For native I presume I can leave them all at
100. Does this tell you anything?
Trying out Native and D65
Since I have two monitors, I calibrated one with D65, and one with Native ... just to see some differences. Native looks more glaring and more contrasty, and whites are really white and stand out, while D65 looks more subdued, more matte more like you are viewing something on paper.
It does feel that Native white point brings out more of the display's color space.
I can make a case (for my monitors) that Native is better for development, since when looking at code more contrast helps, but I can also see a case for more subdued palette of D65 is easier on the eyes and more relaxing even if it is showing less contrast... Trying D65 for a bit before I will try something else.
Profiling Tools Used
i1Profiler software version 1.7.1 and X-Rite i1Display Pro calibration device.
Currently enjoying both monitors at "Photography" Display Setting, which is D65, 120 cd/m^2, gamma 2.2. Thankfully, both monitors calibrated to be incredibly close together to where color shades on one are pretty much the color shades on the other. And for whatever reason, calibrating with 118 default color patches worked better for me than with 462 color patches. 118 ended up not have a blueish or warmish color cast.