I changed my mind I would like to have that many plants using the FIM/Topping methods. I plan on using the bucket recirculating system yes. If any body has better Ideas please post. I need all the help I can get. But I plan on have two seperate systems. With a 50 gallon res supplying water and nutes to 16 plants. Then I will have a 600 watt switchable ballast light over each system. Or should I just use 400 watts. Any help is great!!!!!!!!