Lookup the energy needs to grow plants, panels are like 25% efficient, you'd need to put most of it back into the LEDs to grow anything. Growing LEDs aren't your regular 5w home light bulbs, you need a lot of energy to grow plants.
This is the classic out of depth HN take
This does lead me back to the idea that to cover greenhouses with translucent panels, you would need translucent panels to have undergone a price drop comparable only with regular panels. Which is unlikely. And then you have risks like hail risks that multiply when covering greenhouses with panels. Although that might be an upside, since greenhouses in NL are actively going towards break free glass which is pretty expensive. So perhaps there is a break free translucent solar panel upgrade route that could work out. (I am sceptical, but it is a nice idea indeed. Light is a spectrum and not all light is equal in photosyntesis.)