What type of bulb is globe-shaped with coils inside?
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...


  ...the glow is starting at the ends of the fluorescent tubing (which
  are near the base). This causes the part of the tube near the top to
  cast a shadow on the globe. This is why [it may appear that] the spiral tube
  is not the light source.