thats BS, light only affects plants in the dark if its hitting the plants directly, and that is from personal experience, i have 2 AC units with digital displays, not to mention 2 atmospheric controllers with led displays, and i have not once seen a hermie in my flowering room. if i were worried i would cover it, but truth be told, from personal experience, there is no problem with a little led light, unless its inches from the plants, mine are at least 5 feet away, but are even pointed in the direction of plants. dont sweat it