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Yes I agree, however I also think it is possible that the blue light may burn the leave and cause harm. Here is an example of the mangrove trunk. The area exposed to blue light bleaches white, the area that receives very little light but no blue stays green. Imo, blue light does harm beyond just not providing energy in a spectrum that the plant utilizes.When I read your scenario, I don’t deduce blue light as a culprit.
The lack of yellow, orange and red light was the downfall of that leaf.
