"Shooting in the dark is perhaps the most difficult part about shooting UrbEx. More often than not, we are in very dark places, which are notoriously difficult to capture. Using a tripod is typically mandatory, so you have a few choices in terms of capturing a scene. Keeping yourself safe in these places is hard enough, so I’m providing a quick-and-dirty guide to getting great shots. I’ve tried all of these methods, and while there’s no “right way,” there is certainly a best way given your environment and time restrictions.
You have three choices for shooting in the dark: light painting, using a small f/high ISO, or using an intervalometer. Lighting your shots artificially can ruin a scene’s natural ambience, but it can also add a cool effect in a time crunch. Compensating for the darkness by shooting at low f-stop and high ISO is by far the most efficient method to capturing a scene if you’re limited on time, but you will sacrifice overall picture quality. Using an intervalometer is the best way to capture a scene with its natural ambience and in the highest quality possible, but I only recommend this method if time is of no concern."