[secondo]

Interesting but why would it not apply the same shifting within the green light spectrum which seems to be quite stabile?

https://d2r55xnwy6nx47.cloudfront.net/uploads/2020/07/Plants...

[mdpye]

That's kind of the point. The green section is flat - if you vary the frequency by a couple of nm, you do not see a meaningful change in power input.

But the slopes in the red and blue sections allow you to adjust the input power significantly by tweaking slightly the wavelength of the incoming light.