It's land efficient. And only land efficient. If we get a lot of cheap energy it might make sense if it would allow to basically free up the land for farming.

It's land efficient. And only land efficient. If we get a lot of cheap energy it might make sense if it would allow to basically free up the land for farming. But as long as land is not "expensive", it's just too expensive in comparison. Sun is free and land is cheap, tons of plastic, bulbs and infrastructure is not.