thanks for the kind words
I actually have no photography experience, and dont own a camera… I just have been comparing my flashlights to each other, and taking photos of them with my iPhone (auto white balance), for several years.
Over time Ive come to realize that R9 CRI is the single most important selection criteria, for me. Followed by Tint.
Beam color comparison photos like this one:
show Tint and CCT, but they do not show CRI. (although all the lights Are high CRI R9, 9080 LEDs)
To illustrate CRI in a photo, a white wall wont work, I need to actually use the light to illuminate something with Red pigments… If the LED does not produce Red, then things with Red pigments will not show their true colors…
here is one of my first, most dramatic comparisons of Color Rendering…
Chicken ala CRI:
Recently I realized that White Balance is not just about white, its also about Tint. iow, D55 uses a higher DUV than the Incandescent reference used for the BBL below 5000k… hence the jog in the BBL at 5000k in this next image (I was comparing the Tint DUV and CCT of two different nominal 3000k LEDs)
btw, when I use the word Tint, I mean DUV, not CCT… the majority of time when someone talks about “tint”, they are misusing the term to mean Color Temperature… easily confused factors, but they are independent. To add to the confusion, photos, and our eyes, see Tint and CCT in combination, as “color”.
and as many will confirm, the colors in a photo, are not necessarily identical to the apparent colors we see with our eyes. This is one of the most confusing aspects about Tint, CCT, and CRI discussions. I dont expect photos to be identical to what I see with my eyes. My perception of color is strongly altered by the White Balance of my Brain at the time of observation…
here is a glaring example (both photos of the exact same light, but at different times of day):
@cannga, thank you for all your contributions… extremely informative, and rich in detail
btw, some thoughts about why the sw45k became the Gold Standard for High CRI… imo it is because it was one of the first 9080 LED to become available. Because it has very Pink Tint, I initially associated Pink Tint with High CRI… but Ive since learned that the 519a has CRI R9 that is just as good as sw45k, but without the Pink Tint.
iow, I mistakenly ASSuMeD that Pink Tint equals High CRI… which is not correct. It is possible to have an LED with High CRI R9, and still have no Pink Tint… in fact, the SST-20 is a 9080 LED, but with Green Tint… and the 519a is also a 9080 LED, but without the green and without the pink Tints…
imo, the 519a replaces LH351d, and SST-20, and even sw45k whose Pink Tint is unnecessarily low DUV… Ive become a huge fan of 519a… though I still like tint below the BBL… and the dedomed 519a gives me that too…
I also like warmer CCT lately, Im using lights mostly at night, whereas the sw45k was originally most useful to me as a daytime EDC. I tent to use warmer LEDs at night, and cooler LEDs during the day. The neutral Tint of 519a 4500k is arguably a “better” option during the day, than the hyper pink Tint of sw45k. I think this is partly because the Tint of 519a is closer to the Tint of daylight, than sw45k.
spoilt fer choice
pause wall of words… LOL