The bulb looks like a CFL, but looks like the spiral making up the CFL doesn't actually light.
It takes AGES to light up, at first I thought it was broke, but after awhile realized that the bulb just takes 10 minutes to fully turn on. Full disclosure: Just moved into an apt building, and am curious what type of bulb, CFL, or whatever this is, because I've never seen a bulb like it.
Best Answer
It's a CFL globe, but it's either a very old (early prototype) model that warms up slowly or it's simply worn out.
Also, according to DoxyLover...