[Aglooka]

When the corkscrew bulbs burn out they tend to melt near the base. I’ve seen some that started to turn brown. Anyone else noticed this? It looks like a fire hazard.

[BraveMan]

I had one burst into flames in the garage. The flames were licking the roof truss under it. The flame didn’t abate until I cut the power to the bulb.

I never use one unattended.

[2111USMC]

That's because fluorescent lamps require a ballast to fire them. The ballast in a CFL lamp is inside the base. They do generate a lot of heat.