Don’t ask how I found out.
I assume it is because your red cones get fatigued to high heck and a D4SV2 worth of red light stimulates your green cones enough that your brain sees yellow.
Even after shining it around long enough it starts looking less red and more yellow.
Very interesting!
I get the exact same reaction, the LEDs clearly look yellow while my peripheral viewfield maintains a red glow.
I wonder how stressful (bad) high intensity narrow spectrum light is for our eyes…
There has been quite a bit of discussion on this in another thread, if interested, 670nm helps eyesight thread