I have a following problem - I've measured with the use of manual photometer luminance of the screen expressed in cd/m2. Measurement was performed for RGB(0,0,0) and RGB(255,255,255) patterns. Thus, I've got luminance values equal respectively to 0.639 and 101.2 cd/m2. Now, taking into account resulting range created of those two values, I want to create 10 gray-scale colors equaly spread according to aforementioned luminance range, so I'll get following approximate luminance values of those colors:

[ 10.0561 20.1122 30.1683 40.2244 50.2805 60.3366 70.3927 80.4488 90.5049 100.561 ]

I was thinking about using HSB brigthness scale, but I have no clue how can I achieve values like shown above by manipulating aforementioned scale. For example, 50% brightness does not result in color luminance equal to ~55 cd/m2. 

Thank you in advance for advice.

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