excellent!
our brain also changes its white balance depending on ambient light
so during the day, 4000k seems more orange than sunlight at noon.
At night, after I have been sitting under 3000k incandescent, the 4000k looks blueish compared to ambient light
that is why when someone says they consider 5000k “pure white”, that just tells me they are looking at the beam during a time when their brain is white balanced to ambient light that is in the 5000k range. That same 5000k beam will look blueish when the brain, or the camera, is white balanced to 4000k, or less.
These changes in white balance make single beam shots not very useful. otoh, showing 3 beams at once will give relative color reference among them. This is why Im interested in seeing the old A01 in the same photo as the BLF 348 plus the new A01. Since my iPhone has automatic white balance, it really helps to have 3 beams in a photo.
for example:
that photo has set auto white balance to the XP-G2, so it makes the 6000k look “white”
fwiw, here is an example of using a folded piece of printer paper for beamshot comparisons. I recommend that approach, as it eliminates any confusion caused by different colors of wall paint.
this photo, above, is comparing two Nichia LEDs, the one in the ReyLight is about 4500k, the one in the L11c is about 5000k
you can see again that the auto white balance on my iPhone has set the L11c as the white balance reference.
I find that having 3 beams works better than 2, when using auto white balance. If one of the beams is from a light source that other people are familiar with, it gives a relative CCT reference for sake of comparison.