[jaegerpicker]

In what way? Photosynthesis is about light wavelength's and water is easy to be more efficient since the plants are in water instead of soil. There are numerous successful commercial operations already. Also I've posted a ton of detail on the measurements elsewhere in this thread. When people measure efficiency most measure Wattage from the Sun and that's completely irrelevant.

[imtringued]

Vertical farming is incredibly inefficient. You need massive amounts of real estate where land is expensive, you need fusion reactors as an energy source and it doesn't even compare to the space and energy efficiency of using bioreactors for artificial starch synthesis.