Sculptural lamps create instant drama, especially when placed on or near the floor. Lighting placed low provides great ambiance at a party, creating a soft light that reflects off freshly cleaned floors. These Castore Lamps would create an interesting focal point, grouped together on a low table. More images below.
These Luau Portable Lamps ($250 at Design Within Reach) could be used outside or indoors. They're battery-operated, so you can move them freely without worrying about the cord. The lamp uses replaceable LEDs that last 6-10 hours.
These birch lamps are meant to create "a forest of light." The shade is made from silk and printed with a birch bark pattern. They're small, but they would look great lined up along a low ledge. Birch lamps come in a set of 3, available at Lekker for $450.