I really don't want to sound harsh but I like the concept, but the execution is boring. There could be ways to improve upon the concept like many having shadow creatures come out and attack the lights. I think having some living things (like animals or people) to raise the stakes would be nice here too. Another interesting idea is to have a quick flash, to light up the entire environment in a moment (but will replicate the current tile that you are standing on) and the light lasts shorter than the lights you set up.