I would have to agree that its probably true. And that's why I like having the switch. Because when I have just the veg switch on the light produces 75% Blue waves and shuts down the majority of the red lights. So I get a nice bushy pepper plant which I prefer to a tall spindly pepper tree that cannot support the weight of its fruit during production and ends up snapping branches and limbs off. Where as with a light that has no controls or switches you do not have the option to make the light produce more blue's than reds. You simply have all the lights illuminated at all times with no control over the light. If you could see my peppers you would see that they are nice bushes, and that is all due to proper lighting as well as proper topping and trimming of the plants in their youth. I am just saying that it's nice for the user to have more control over the light. So when recommending lighting to other pepper lover's I am going to give them the best advice as to what I have actually tested and is tried and true. As I have tested LED's with and without lighting controls both putting out the same power and I did see a noticeable difference in growth and form in the same species of pepper both sown at the same time.