My question essentially is how much water to power green house LED lights. Specifics bellow :
Say I have a warehouse with a flat roof with a bunch of water tanks or the whole thing being a water tank. Using say 30 feet High and 20'Lx20'W. How much power could I generate utilizing the roof to store water?
One lighting fixture could run 400 watts.
I was pondering these last few days on this, I've googled a couple of equations but not sure I used the right ones. Thanks for your input in advance.