They will be black frames with some sort of black abstract art like this.
The frames have more of a wider frame - maybe 2” black around

I would do the larger size and place them one above the other. You can then keep the lamp in the corner.

Ohhh I have never thought of putting them on top of each other. Still 24x36” frames on the 78” wall?

If you want to hang them vertically, use the smaller size, but I think the larger size hung horizontally is best, even with the lamp.

Cat, you can be daring and different ... what is the worst that can
happen ... you end up with a few extra nail holes on your wall!

Had a friend who was an art major, worked in the art world and had
been collecting art all her life. She had original art everywhere,
filling walls from top to bottom, and side to side, in all types of
arrangements, in every room. Yes, it was a bit much for the "average"
person, but the majority of people play it too safe and boring with
their art. Somewhere in between would work for most people!

If you love the art then there isn't a wrong place for it in YOUR house.