I agree that marijuana farmers are innovative. But they are constrained by artificial barriers (laws). If marijuana farmers had to compete in the free market they would be using the same techniques as ADM or OreIda. People are willing to do expensive impractical things (like growing in a basement under artificial light) because they can charge enough for the product to recover the costs. The only way this type of farming would succeed is as a boutique industry with people growing baby carrots ands micro-greens that they can ship to overpriced restaurants which sell them at a premium cause they are fresh picked. Now - growing shrimp or fish in basements where there is no competing interests (residential or retail) might be more practical. You can feed tilapia or shrimp waste food from the restaurants - then sell them back the fish .