older people have yellower lenses,
they perceive tint to be further above the duv
to compensate, they like pinker tints
to bring the perceived tint closer to the BBL
My eyes are old, and my lenses yellowing
I am highly sensitized to recognizing green tinted LEDs
and my favorite LED is very Pink, sw45k
people who use a flashlight when their brain is white balanced to daylight, will find daylight duv does not appear green, even though it is above the Incandescent BBL
people who use a flashlight when their brain is white balanced to incandescent, will find green tint (above the bbl, like daylight), to be very obvious, and will prefer LEDs whose tint is not above the BBL (positive duv as in daylight)
examples of LEDs with tint above the BBL, LH351d 5000k, SST-20 4000k
these are useful when the brain is daylight adapted
will seem green when the operators brain is incandescent white balanced
examples of LEDs with tint below the BBL, N219b, especially sw40 9080 and sw45 9080
more useful when incandescent white balanced
will seem pink when the operator’s brain is daylight white balanced
the effect of white balance on the perception of color and tint