This will help get some light into the middle of your space. http://www.westelm.com/m/products/overarching-floor-lamp-antique-bronze-w890/?pkey=cfloor-lamps You could also do end tables or a console behind the couch and place table lamps on either. It doesn't look like you have any seating near the edge of your space and your existing lighting seems to be positioned at the edges of the room. So I'm not sure if sconces would help much.

I love your wall color. A green print bed spread with yellow and purple colors would look great with your wall. Can you move the mirror/night stand to another wall. It looks crowded in that corner. Then mirror glass side tables with drawers would really sparkle against the purple wall. And then art on the walls.This is not a bedroom but you can see how green, yellow and purple go together.

I like the room but it looks a bit empty. Possibly some contemporary low interesting cabinet on either side of the fireplace some organic baskets or metal vessels of some sort on top of the cabinets. It will fill in the bareness between cabinet and sconces. Roll down textured shades at the windows would add a nice fill in touch and add privacy and block light. Or simple linen floor to ceiling curtains on rods at ceiling height. Here are three rooms with free standing cabinets and long curtains at the windows. You might like these ideas for not. Art work could be under the scones with lamp for ambient lighting Again simeple cabinets and surprise, a TV stand too. This is a lovely idea too with the twigs; could change seasonally. I like the benches for warmth and texture and softness and the chandelier adds a dramatic touch. Good luck with your lovely room!

I agree I need a customer wall to wall solution and maybe a full mirror for a small bathroom would look good. The challenge coming are those electrical points. Also someone guide as to what is the right width of the mirror I should put incase I just decide to put mirror over the sink? Is there enough space for framed mirror? The width of the countertop is 26 inch and the height from countertop to sconce is 52 inch. Thanks a lot