I’m still looking for a little more clarification to my last question.
I do have a the Spears and Munsil Ultra HD Benchmark disc, and maybe this has the means to get correct reference levels.
The Spears & Munsil Ultra HD Benchmark disc for display calibration and home theater setup. Pairs perfectly with MediaLight bias lighting.
www.biaslighting.com
I did look at the disk a couple times, but it does seem pretty complicated for my current knowledge