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Really? Anything I can apply on a commercial scale? If you could light up my farm at night then we could double our wheat yields.

how do you get the sunlight into each floor?

I've seen this feel good idea about growing food on the rooves and walls of skyscrapers. At the end of the day a city can only collect the sunlight that fell on the ground before that city was built. The CBD of melbourne is approx 1 square mile = 640 acres. 640 acres will not produce enough food...