Displaying cards ok or no?

[silvor]

I have two display cases I used to have action figures in. It's about 36x36" and 4" deep. Made of walnut with glass shelves.

The first case is in my basement, split level house, so the basement is only 4 feet under the ground. It's not humid, not in direct sunlight - not really in any light. Just in the corner of the basement.

I have LED lights on the cabinet, but never and will never use them.

If I put my graded cards in the case with the sleeve covers like this:
https://www.ebay.com/i/141721301364?chn=ps
over, think that will be ok?

The second cabinet is in my kids room and he has his cards in penny sleeves, then a top holder. The light isn't direct, but he gets some morning light. Not direct, just the room is pretty bright in the morning.

What do you guys think?