Do TPG holders.....
 

have any UV protection? I've put my display back up (new house) and there is a little more (non direct) sunlight in this room than my last place. It's more of a glare than anything (see pic 1) but is it to much? The 2nd pic shows it without the glare.

Sorry for the poor pics I took them with my blackberry.

No!

So you may want to get frames that offers UV protection.
Or limit the amount of time your frames are exposed to light.

How bad can indirect light be on cards?

I have some cards displayed on a bookshelf, which shares the wall with the room's only window. The window and shelf are well offset and at no time does the sun directly strike the cards. There's minimal reflected light from the opposite wall since I have mostly dark clothes hanging its length on a rack.

I seem to recall that BVG slabs do, but SGC & PSA do not.