Photosynthesis doesn't use sunlight all that well, PV + wavelength tuned LED can turn the same amount of sunlight into more biology.
But! Farmland is dirt cheap, so that's more of a solution in search of a problem than anything else.
Also, agreed to the final point.
Plus, the comparison shouldn't be "open farmland vs. PV+LED", it should be "for the resources cost of PV+LED, what can you build in the way of polytunnel or greenhouse?"
Which in turn reminds me of this YouTube Mars botany simulator, whose validity I can't help but doubt, but which is nevertheless moderately interesting: https://youtube.com/playlist?list=PLKhDkilF5o6-Hfsnhn_HFxjJ0...
Photosynthesis doesn't use sunlight all that well, PV + wavelength tuned LED can turn the same amount of sunlight into more biology.
But! Farmland is dirt cheap, so that's more of a solution in search of a problem than anything else.