Full Res Version: http://500px.com/photo/55022812
This is Day 14 in my Photo Advent Calendar, this blog post is a little late, and I have skipped a few as most of the photos before this didn't need explaining and the details of the photo displayed on 500px is enough to understand how it was shot.
This photo however was lit for a particular purpose, a short film that I was DPing. The photo was mainly lit with the obvious source in the photo, the lightbulb on the left of frame. There was however another 650w light on the far right of frame out of shot that slightly lit the right of the frame but also some of the left; we used scrim (black tin foil) to cut the light down to a strip of light instead of a large flood.
I shot this on a 4 second exposure as I had the option to do so with nothing moving in the shot and the option of a tripod. I did this instead of cranking up the ISO which would have left a grainy image - long exposures can cause grain too but not 4 seconds.
In post I initially lowered the exposure, ramped up the contrast but did raise the darks of the image to not let those dark areas get too dark, I next lowered saturation and raise the highlights to make the bulb appear brighter, I next added a large vignette to add atmosphere and to point the audiences direction to the left side of the frame. After that I added an adjustment brush to the bulb to raise the exposure of just that area and also a gradient filter to the left side to add a little bit of exposure to that side to pick some detail back out.