what I ould do is when you switch to flower just run the green light during the dark period. That way you can see if it has any effect because if it does your plants wouldn't flower in the first place, but you probably already have plants flowering LOL.
I just don't know. I read that greenlight is supposed to not have an effect, but is that wat is considered a green light? because the light is a different color before it's put through a "green" colored film or w/e. Also, they always say that the plants reflect the green light which is why we see the green color. That sounds right but what about purple plants or a different color plants? Do they absorb green light and reflect purple light?
Not trying to confuse you or give you false info or anything, these are just the things that go through my head when I thin about them. Mybe I will buy one and do as I suggested and see for myself, I just don't enter in the dark now.