Curious if anyone has had success claiming some type of Industry cited / average / worst case LRV for surface finishes such as standard poured in place concrete flooring.

If not, does anyone have direct experience and know what's involved with field testing to ascertain this data? Is this something a Commissioning Authority could feasibly test/confirm in the field? Or does field testing of light reflectance value of a material require a specialist? Or perhaps a mock up sample would need to be shipped to a lab that can provide the testing?

Just wanting to verify if this is a major undertaking unless all significant finishes have manufacturer data to corroborate LRV. I suspect it is...