Painting the night is very tricky.
I had a try with one of my sketchy panel plans.
I had a bash and this is what happened. The top one has bits in pencil and bits inked just because I was playing about a bit. Sort of tried one with just subdued colours, then one using mainly one colour to wash everything out in the way that night time so often does. Neither looked really night-like.
But the power of editing has helped somewhat.
The purple one I digitally inked afterwards which I rather like.
(yet again, colours coming up way bright on the mac :( which one is right? oooh that's a debate, pc or mac?)