There were a number of consideration I had to take into account.
- In order to get the surrounding area (background) as dark as possible I need to place the lights as close to the model as possible.
- I wanted the blue to be restricted to one side and the side that isn't gelled is allowed to wrap a bit around the face. This ment to use a bare speedlight with the blue gel and a speedlight with a reflective umbrella.
- By the lack of booms I had to place my lights about as high as the model's face. The original shot has the "white" light comming from above on camera left.
- Since I wasn't able to focus while I'm sitting as a model, I've increased the aperture a bit and focused on the speedlight on the stand with the umbrella mount. Since this is the same height and distance as the model's had it should work.