For those of us with autoimmune issues, we have really bad UV reactions from sun, it starts a flare up, but so does hours of exposure under fluorescent lighting, the flare ups are bad, they take me out for a day, at least.Can't move, muscle pain, swollen glands, vomiting, sore throat, fatigue and weakness. I cannot do direct sun, or flourescent lighting, I know the LED bothers something in my brain. I use sodium lights for my plants, 300 watts, that light does not bother me when it hits my skin. Bright though, lol. I also use UV light but it is directed and doesn't spread outside of the area I spot it on. Gray/silver light from constant overcast can mess with your head. Our brains need light, we are not nocturnal, and the artificial lighting for decades has messed with so much. I know nothing of tech, but it seems simple to me, as far as making another sun. Mirrors. At this rate, they will put a dome over the whole thing. I'm glad I won't be around for that.