> Building a specialized building is a compromise putting you into an uneconomical position, you'd only provide additional light to the top-most layer of plants

> Building a specialized building is a compromise putting you into an uneconomical position, you'd only provide additional light to the top-most layer of plants (small operating savings) at the cost of building specialized architecture (large capital expense). Couldn't you improve upon things by redirecting the light with fiber optics? Of course, I suspect there's a surface area problem with scaling something like that, so perhaps not.