Magenta greenhouse glass generates electricity, doesn't bug plants
The greenhouses utilize what's known as Wavelength-Selective Photovoltaic Systems (WSPVs). This technology reportedly "generates electricity more efficiently and at less cost than traditional photovoltaic systems."
Embedded in the roof panel glass is a bright magenta luminescent dye. It absorbs blue and green wavelengths of light, and transfers its energy to narrow photovoltaic strips. It is these strips which produce the electricity. That electricity can be used to power things in the greenhouse such as fans, heaters and watering systems – this could allow the greenhouses to run off-grid, and not rely on fossil fuels.
Read more at New Atlas (Ben Coxworth)