I saw an example in the CB2 with two of the firefly lamps over a darjeeling table, and as I was buying the darjeeling and only had one fixture over the far side of it, I realized this was the answer.
I bought two and my father helped with the install--we drilled a hole into the ceiling for the new fixture location and snaked a romex back to the existing fixture. Since I'm in a condo, I have inch thick sheetrock ceilings, so we needed to drop some pretty deep anchors in, but fortunately the fixture only weighs about 12 lbs so nothing too heavy duty was required.
We measured out and put both fixtures up and it turned out amazing. I bought 10 type g candelabra incandescent bulbs and put in a dimmer and it's really great--at the lower settings, the light reflects in the globes a good deal, like one of the other reviews said, really giving the firefly look.
These are absolutely brilliant and everyone who's seen them comment on them immediately. And my beautiful table.