I just bought Aqueon LED fixture. The fixture has three strips of LED light. Fixture came with one but I bought the extra 2. I have a 36 Gallon bowfront tank. I always read that on a planted tank I need 3 watts per gallon. Is this still valid for LED's? Because considering I have a 36 gallon tank I would need at least 80 watts of lighting but each LED strips states they are 4 watts. Is this per strip or per bulb. I am a little confused.