I would like to understand your position, but from my own thoroughly practical perspective I don't get what you're attempting to convey. As I understand it, the ideal environment "to preserve subtle color fidelity" would be:
1) a color-controlled room
2) 6500k high CRI bulb for a bias light
My practical assertion was that many people don't have a dedicated theater room and are likely to have at least a somewhat tinted environment next to the display. I question how well does the ideal stand up in the real world when the environment is not very close to color-neutral? I question if the "well proven, long established, imaging industry standards and recommended practice" actually apply in a tinted environment with indirect light. The statement that "Industries that rely on consistent and accurate color judging under artificial lighting recommend a minimum CRI of 90" has me questioning, were those recommendations based on reflected light in environments that were not color-neutral? By my rudimentary understanding of physics, my "guessing" is that the color spectrum from the bulb would change as light is reflected off of a tinted surface. If that's at all accurate, then to what extent does CRI then matter? All of these are practical concerns, so I don't understand why your reply concerned ideals and a non-working personal anecdotes link.
My "speculation" was that by watching the display in an unlighted room the environment would have less impact on the perceived image. Basically I was presenting an unlighted room as the control situation. It seems every consumer display system probably already suffers from "less than ideal performance" (http://www.avsforum.com/avs-vb/showt...2#post12468022
), so I don't get why it wouldn't be reasonable to discuss this in objective terms and by individual observation to see how many people can personally notice changes and how many cannot. I had a hard time not simply writing off your prior reply as marketing.
So if someone watches in a dark room and then turns on and off a backlight to tell if they can perceive changes in color, what comments would you have about such a testing procedure? To me it seems an entirely practical way to test if a bulb is "no where near suitable for video bias lighting" by observing if you can personally notice a change in the image. Of course in a typically tinted environment it would seem to me that a higher CRI bulb might also fail this test for someone that could perceive changes. Anyway what I find interesting is engineering and this isn't my "business", so I thought it would be interesting to have some of my "general guessing" set straight if I was way off base.
To simplify all this into a few questions:
1) Has there been any testing which is directly applicable to the situation of reflected light in a typical bias light situation where the color in the room hasn't been specifically chosen?
2) If someone cannot observe changes in color by switching on and off a backlight, why would they then choose a more expensive higher CRI and higher wattage bulb?
3) Are you aware of any testing procedure, maybe along with a photographed image or video, that might allow a person to observe how an inferior CRI bulb can be a detriment "to preserve subtle color fidelity" with their display?