A few strips of LED lights can do a lot to lighten up a room, and YouTuber Darbin Orvar shows off a project that mounts a set of LED-lit cube shelves onto a wall.
This isn't just slapping some LEDs inside a cubed shelf and calling it a day. She mounts the shelving to a platform that mounts to a wall as a whole unit, hides a set of wires behind it all, and adds in a switch so you can control when the lights are on. The whole projects documented on YouTube if you're interested in taking it on yourself.
LED Wall Cube Shelves [YouTube]