This seems too dark for me. Hard to tell that the light has been 'painted' on or if it's just a stationary light source. i like the pose, and it's very tastefully done, only wish that the subject were a bit brighter. would love to see this in more detail.
A good image, nice pose. My first thoughts were "too dark" but given time to look I think you have it just right. It has and aged "Old Masters" feel to it. I'm thinking Leonardo Da Vinci. With each passing moment I like this image more. Very well done!
The problem is that if you do a really good job paining with the light - it does not appear that you did so. It almost looks like a single source. But I think you did a great job. Looks like an old oil painting. Great.