I find the Beckham Library Sconce from Ballard Designs to be very clever:
I am forever wanting to tuck sconces in places that are less than ideal for cords or wiring. This lovely little light is a clip-on, but looks so sophisticated don't you think? I love how they have styled it here on a bookcase shelf. The price is great at $39 and it would look fantastic lacquered a fun color if you don't like the finish!