Once when I turned off the desk lamp and went to sleep, it suddently started to flicker drastically and would not stop. So I could only get up and turn off the switch of the plug, the flickering stopped immediately. This has never happened before.
I tried to recreate the same thing in the next morning, but did not manage to.
Does anyone know what might have caused this?
I am not sure what kind of lightbulb does my lamp has (it was from previous tenant), it might be energy-saving lightbulb.