What can cause a lightbulb to glow when turned off?

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Offline thedoc

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Robert Rowen  asked the Naked Scientists:
   Last night, I awoke suddenly and a nightside lamp glowed dimly for a few seconds. (It had been turned off for several hours. The bulb distinctly glowed for a few seconds and then stopped.) It has a CFL (compact fluourescent) bulb and a simple on-off switch (It does not have a "glow" switch, which I understand can cause this). We live in the mountains and thunderstorms have been predicted but it was not storming at the time. Is it possible there was a charged cloud of ions that wafted through my bedroom, or was this a ghost?

Very curious...it was very disturbing.

Thanks if you can shed any light on this.

Bob
South Lake Tahoe, CA, USA

What do you think?
« Last Edit: 16/10/2013 11:30:02 by _system »