Thank you very much !
The story is quite simple, really : a boy with a pretty fertile imagination is afraid of the dark, so he imagines his night light as a light fairy, a guardian keeping darkness at bay
But one night his night light runs out of batteries, and he tries to fight his fears by using his imagination once again, picturing a fight against darkness in a fairytale-like world that is his depiction of darkness' realm - which results in him growing out of his fear of the dark once he defeats darkness
I think the story we tell ourselves as children are magic in themselves, and I wanted to pay a tribute to that.