That it is but seeing as tho plants have adapted to the sun there would be changes when u change spectrum rite? Example we breathe in o2 but if we adapted to take in co2 then we have to mutate n adapt just speculation on my part but imo if plants have the closest thing to the sun then I believe they can grow to its fullest genetic abilitiesThat's purely speculation unless you've been able to do a controlled study to prove a mutation had even occured. An interesting thought though . does your light set up have a UV spectrum? The sun emits uv rays as well so you'd have to account for that in your mutation theory as well.