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I would like to get feedback regarding the amount of lighting I am going to need for a planted tank. I am not new to having an aquarium, I had my tank for 5 years now, but I would like to grow a variety of plants. Here is what I have. The tank is 200 gallons. It is 2' x 5' x 29" to the water line. The tank has a sealed top that the light has to pass thru and I have the lights 1/2" from the top of the tank. I plan on have 2"-3" inches of substrate (I just started a batch of mineralized topsoil and I plan to top with sand). I am also planning on having some built up areas in the back of the tank and driftwood. I also have a pressurized CO2 setup. I currently have two compact fluorescent 4x65W light fixtures with 6,700K 21 inch bulbs. So if I do the math 8x65 = 520 and divide by 200 I get 2.6. I have read that a number of 2 to 3 is good. My question is, Do I have enough lighting for the tank depth?
 
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