Matching the monitor white point with a bias light

[Alexander B.]

I’m using a bias light behind my monitor to reduce eye strain in a dim environment. I tried to match the white point of my BenQ BL2410PT monitor by measuring the chromaticity coordinates of the ambient light in DisplayCAL. Unfortunately, the calibrated monitor always has a little magenta cast and the light behind the monitor a little green cast. Even the default 6500K setting results in a calibration, where natural daylight seems to have a green cast in relation to the monitor.

• Is it worth it to rent a spectrometer to measure the white points more precisely? (I still need to create a colorimeter correction for my monitor.)
• Or is it necessary to match the points manually with the visual white point editor?

I am using the colormunki Display.

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[Florian Höch]

For the best visual match, the visual method is recommended. I.e. adjust the monitor whitepoint until it visually matches the bias light hue, then calibrate & profile.

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