jordan
Glad this post could be helpful. I would caveat that by saying safe to this limits of my measurement and personal physiology, stress levels, etc. One thing, I would hope more people on this forum would discuss is how to improve "immunity" or "tolerance" to these less than perfect devices.
I took out some old polarized sunglasses. The 7i is black when looking through sunglasses rotated 90 degrees vertical. The LG is black when looking through sunglasses normally, horizontal. I think this is common for screens to differ like this.