The designers at Hulger thought that compact fluorescent light bulb design is too staid. (And boy are they right, although there's an obvious practical reason why the tight little coils of CFL bulbs are the way they are.) So doing what designers do, Hulger created several prototype bulb designs in the hopes of inspiring bulb manufacturers to offer more attractive options.
I think they're just wonderful. They remind me of the phosphor trails left in your eyes after someone waves a light stick.
Dezeen has the whole run in pictures.
Plumen low-energy bulbs by Hulger [Dezeen]