Battery operated wall lights have come a long way since the days of those stick-on lamps that went in the back of your closet the ones that never seemed to quite work right. You can now get beautiful sconce lamps that use LED bulbs and batteries for long-lasting illumination that doesnt require an electrical connection. Perfect for dark corners, elimination of extension cords, and reliable emergency lighting. You can still get those modest lights that are great for the interior of closets. For outdoor walls, you can even get solar powered wall lights with motion detectors.