This is a classic example of book knowledge, and reality. The type of light is important. Days of sunlight mean little, if the sun barely gets more than a few

This is a classic example of book knowledge, and reality. The type of light is important. Days of sunlight mean little, if the sun barely gets more than a few degrees above the horizon. And our human bred crops? Well, we'd need to take time to even hope to adapt them. They are very coddled, and need loadd of sun.