WE have a number of the HD CF lamps, "Commercial Electric" brand.
The other day, one of them in kitchen lamp started smoking and flickering while my wife was at the kitchen table.
I don't know what would have happened if she had not been there watching it, but she turned it off in a few seconds after she noticed it. In teh picture you can see where it started to burnn and char the enclosure.
I have been tempted to put it outside and turn on again to see if it would actually start to burn, or drip burning stuff..... but I have not yet.
If not watched at that moment, who knows what might have happened?