I put up 5 shelves like what is pictured that holds 4-5 slabbed comics in my den. So i have about 20-25 comics displayed. I rotate them every so often, depends on my mood and if i picked up anything new. I store the rest of slabbed comics in the BCW bins, out of the way.
i put UV film on the french doors that lead into it, its the only source of daylight. Here is the link for UV film:
https://www.amazon.com/Uiter-Blocking-Privacy-Decorate-Windows/dp/B07GKY6N3Q/ref=sr_1_3?crid=ONIXVT1AQN4T&keywords=uv+film+for+windows&qid=1557965005&s=gateway&sprefix=uv+film%2Caps%2C206&sr=8-3
No one goes in there without me. I only show friends if they ask nicely..lol.
I agree with most, I feel the need to display them as pieces of art. I know they still get some rays but its minimal i believe. I am thinking of putting SPF-40 sunscreen on the cases