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I wonder what the energy budget look like for an operation like that. The argument against urban farming is that it is energy intesive and not really space efficient if you include the space needed for the extra energy production.

It would be interesting to see a comparison with conventional farming where the energy to produce fertilizer was included.

They aren't growing significant calories and hydroponics do not currently have the ability to do so in a way that competes with soil cropping

Thats cool but you probably need ~2000 calories a day which would require chewing through 28 pounds of lettuce(70 kcal/lb) which ain't easy.