I meant to say, to be more clear, he was saying no matter the wattage going into the different COB brands, they run at the same efficiency when running at the same wattages. So if they are running at the same wattage 35w, 50w, or 75w, they are gonna be getting the exact same efficiency. I know thats not true based on reading actual data on sites testing them in comparison. But thats neither here nor there, because thats not important to me. I just want the best setup to grow the fattest buds in my 4x4 tents lol.