Here's another from a recent sketchcrawl in Chesterfield. It did not take place at night. It was just that the sketch was looking a bit bland, a bit empty, so I kept playing with it. I started with the idea of a dark sky and then decided on some colour. I'm not sure that it works - but you'll never know if you don't try. The green light looks like some ghostly apparition. And, as I found out, when doing the research on the Royal Oak (Chesterfield's oldest pub), there are actually ghost walks held around the The Shambles' ancient narrow streets. So, it seems, it's quite appropriate.