It looks like you will be getting light from both the top and bottom of these sconces, and so I would try to do a test installation before doing a permanent mount. I have a portable wall that I use for testing the sconces that I design, but you might be able to make something similar yourself with a half sheet of plywood and a "J" box. You will need to add a block of wood next to the hole that you cut for for the J box, for mounting the J box. Here's part of the drawing I used for building the sample wall, showing plan, back view, and side view. The rectangle in the center is the hole for the J box. This drawing does not include the base we made to hold the wall.

I agree w/ tozmo about disliking black and thinking that a creamy color would complement your brick and stone better. Re window boxes, I'm in z5 so they're planted from the end of May until the frost kills them (usually Sep or Oct). One year I decided to fill them with stems of silk mums for autumn, then switch to silk poinsettias right after Thanksgiving. I didn't anticipate the mums being frozen solid in the soil until late April. LOL!!! Fwiw, I now use fresh cut evergreens for my window boxes in the winter and love the look.

@Diana Bier Thank you for your input Diana and suggestions and fresh ideas. And @roarah thank you as well for the ideas. I have written to Houzz about why we cannot load photos. I wanted to show you all I did paint my open study off the foyer a very dark Van Duesen blue by BM but because my dining room was so dark before I used BM White Dove in it for a break but I do love dark walls and may paint again in the future. Maybe some dark velvet draperies would be pretty in the DR for drama or is that too much with white dove. My house is very open and the DR and study flank each side of the foyer as you enter the house with case openings. In the meantime I have a technical question for everyone. My dining room is 15'9" x 12'4". I was thinking I needed a 9x12 rug until I tried one and it is about 6" too wide. I will have to move my funiture to place it on top. uggg it is all so heavy but I want to do the right thing. So that leaves me to find a 8 foot to 8'6 x 12 or 13' rug which is not easy to find on the width. SHOULD I bite the bullet and go for a 10x14 for this size room and just move everything again - then the funiture would rest on top. Just wondering what is the right size for scale of room.

It doesn't look familiar--it may be very old and not manufactured any more. Do you need this exact piece? Or maybe look to see what's available in your price range with a similar look?