The books are in Mylites2 Sleeves which says "Get Protection from a Variety of Hazards", one being Ultra-Violet Fading. Not sure how much protection but they don't get any direct sunlight, and the bulbs, I believe, are LEDs. I read the Fluorescent bulbs are very hazardous, so if you have those don't even try it. Pulse the light in this run are hardly on as it is the room in the house I use as an office, so I get enough light from the computer.
Also at times I rotate the books out unless I get more shelves.