Card exposure to light - effects

[David W]

They will fade, especially under sun light or fluorescent.

I've got a 1984 Topps uncut sheet behind plexiglass on my office wall, and it
has faded quite a bit.

I've also got other cards displayed on shelves, and some have faded. None are particularly valuable - they are 1964 Topps Giants.

What I did for my more valuable cards I wanted to display was make a photocopy of them and put them in a holder or a frame.

You cannot really tell they are photocopies at first glance.