I am writing to describe a near miss fire in my home.
A GE helical 20W CFL light bulb hanging in basement almost caught fire.
From the bulb base:
120 VAC, 60Hz, 300 mA
made in China
I was in the basement doing work and smelled burning plastic, looking around for the source, it was apparent that the CFL was burning internally in the ballast portion of the bulb.
There were visible sparks inside the plastic ballast, smoke was coming out of the ballast portion, and the plastic encapsulating the ends the glass helix had melted, with the helix hanging at an odd angle.
I unscrewed the bulb using an insulating cloth, the unit was very hot to the touch. I am certain it would have continued to burn if I had not cut the power off.
This bulb was securely screwed into an inverted ceramic Edison style socket. All areas of the bulb hung in free space (it was not in any type of enclosure that would limit heat dissipation). This socket is not under dimmer control.
I can send digital photos showing the burn damage if this is useful.