Hello I'm getting ready to buy an led light from advancedledlights and I want to make sure the light is powerful enough. My grow space is 2x2x6 and according to advanced website the 100w diamond series light is the size I need. It says the core coverage of the light is 2x2.5. I just know from the past that light companies tend to give too much coverage area of the lights and I'm not sure if that's the case with these led lights or not.