You seem like you know a lot more about this topic than I do lol. I've updated my comment to some important context I should have added from the beginning. You can also dig through this thread to see more in depth explanations of lacking context.

The sun is a greenish star and what I was getting at was that a large portion of the Sun's emitted energy is in the form of green light meaning that plants can reduce the magnitude of fluctations in recieved energy by reducing their intake of green light. As you said though, you haven't seen it definitively proven that this is the case.

As for the red a blue wavelengths of light... honestly I don't know nearly enough about photochemistry to talk on the subject and was just parroting what the research paper reported. I am not nearly far enough into quantum to have even heard the term exciton lmao (but I did look them up and they seem cool).

Fantastic to know that plants are just magic actually. Very cool