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What does my idea (more discussed in this thread) have to do with small details you mention. My idea of calibration is only about getting everybody closer based on averages, and eliminating the large differences. Averages based on various peoples calibrations who again are based on countless of lights that have been measured.
The good thing with my idea is that there is no right or wrong when it comes to standardization because its just based on averages, and the goal is not to get perfection, but only to minimize differences. There is no cost involved. Many people does not even have to change a thing about their numbers.
The two main issues with my idea of calibration is that its based on averages on many different lights, so its not easy for people to join in on the calibration without having a couple (the more the better) of lights that is comparable with others. Most people who often does reviews or share numbers will over time be able to overcome this, and adjust their numbers accordingly to others (if they want)
The main problem with my idea is that most people does not seem to know how their numbers compare to others. And even if I try to show (read the part directed towards rdrfronty and you guys) that some on average have higher numbers, there seems to be no interest in doing changes in the calibration in order to become closer to other peoples numbers. So unless people put in a little bit of effort, there will be no improvements, and we will continue to see these large differences.
Another way of getting people closer would be for many to join "djozzlumen/lux", which could become "BLF lumen/lux" over time. I would not expect perfection with that either, but it would be another way to eliminate the larger differences that we have today. But as with my idea, the main problem is to get people to join.
I can say I would not join in on that unless many others do. And if many others did join djozz numbers my calibration would "automatically" adjust closer to it. This is simply because my current calibration (which is something Im always willing to tweak, and still is tweaking) is very close to other peoples calibration. As good as Im capable of making the numbers. Basically my numbers are currently in between the "two camps". (Described better in the thread I linked to.) I have some preferences about where I want my numbers to be when it comes to both lumen and lux compared to others (in order to make my numbers as comparable to others as possible), but that will be tweaked over time. And if certain others change their numbers, that will affect my numbers as well. The fact that I can play with my numbers in between the "two camps" says it all about how large the differences are.