Yes, otherwise they vanish never to return. The unresolved ideas I hit the sack with often get sorted out in my dreams.
Immediately you switch the light on and start scribbling?
I write in the dark!
Can you easily recognise it later?
It looks like automatic writing done by a medium in séance! Nobody else can recognise it.
Does this nightly act take its toll on your health?
It does. But then life without commitment is meaningless.