Just wanted to share how I edited this image since a few people asked me about it. Shooting with one main light source can create real dramatic images. As I was shooting this I knew it would make a great black and white image. Here are the steps I took to edit this photo shot in the dark.
My settings for this image were ISO 3200; F2.8; SS 1/200.

First I cropped using the rule of thirds.

Then I flipped the image. I wanted her gaze to draw the viewer’s eye across the frame from left to right.

Then I converted it to black and white.

There were a few distracting spots in the background and a stray hair that I cloned out. I also added a little grain.

Final image with a few more taken at the same time.

I hope this encourages you to try shooting in the dark more. I really love how dramatic it can make an image!