Depending on the geography and building design, you can carry light to the plants via optic fiber. They act as a light pipe/optical waveguide. No need for any p

Depending on the geography and building design, you can carry light to the plants via optic fiber. They act as a light pipe/optical waveguide. No need for any photovoltaic solar panels. However this design necessitates a skyscraper in the middle of the desert with nothing else blocking line of sight. Great if you are in the Middle East. Not so great for New York or Seattle. For the latter cities, a permanent barge on the Hudson/Puget with a fiber optic connection could be a solution (the losses would be great and it may not be much cheaper than using electricity, geography and land costs will have to be carefully accounted for). Here are some simplified designs for home use: https://www.lowes.com/pl/Tubular-skylights-Skylights-accessories-Windows-Windows-doors/4294696743 https://www.lowes.com/pl/Tubular-skylights-Skylights-accesso... Some commercial suppliers: http://www.huvco.com/ http://www.huvco.com/ The technology is very cut and dry. If you are a well funded startup, it may be more economical to acquire an optic fiber skylight manufacturer instead of ordering OEM.