LEDs, panda film, pvc, or whatever materials necessary will never keep up or surpass growing under the big sun in the dirt, even my floating aeroponic setup couldn't surpass Permaculture design, even if you stack them 20 miles high the energy used to create and maintain them will be obliterated by any other system which takes advantage of the sun and dirt of the world. Go research Permaculture in the desert, when you can do that with LED's I will take notice.