[gus_massa]

Yes, but does the reduction of the other cost win against the increase of cost of illumination? Do you have a table with an estimation of the cost in each scenario?

Some back of the envelope calculations: From [1] the cost of fertilizer is like $150/acre and from [2] you can get about 7 tons/acre, so it's like $40/ton. The numbers change a lot from source to source, so let's multiply that by 2, and we get $40 of fertilizer per ton.

So in the impossible best scenario where the indoor production saves you the 100% of the fertilizer, you save $40 per ton of fertilizer that is much less that the $3000 per ton of electricity for illumination.

[1] https://farmdocdaily.illinois.edu/2017/07/fertilizer-costs-i...

[2] https://www.seedcorn.com/resources/estimating-corn-silage-yi...

[xyzzyz]

Even if you go full renewable fertilizer, and run Haber-Bosch process with electrolysis-based hydrogen and electricity as energy source (instead of natural gas which is currently used for both), you’d still increase the price of fertilizer by a factor of 5 at most, not getting even close to the cost of artificial illumination.