A recent study from the University of Toledo suggests that blue light from digital devices as well as the sun transform vital molecules in the sun’s retina into cell killers, according to phys.org. 

We need light to grow things, that’s a pretty fundamental part of farming -- and life. Which is why the notion of growing plants in the deep vacuum of space is such a tough problem to solve. 

When you’re an astronaut on a long expedition however, a replenishing supply of plant-based resources sounds much better than freeze-dried food, and may even be necessary as we embark on longer missions into deeper space. 

Although the use of blue light is an excellent solution to provide environmentally friendly lighting, it also poses a large number of health risks and disadvantages for humans. Before the creation of artificial lighting, overexposure to blue light was never an issue. Now, thanks to newer lighting technologies, our evenings and nights are flooded with illumination. As a result, excessive quantities of blue light and poor lighting, in general, can pose threats such as: