Why is the Spot light no longer working? The problem occurs when I increased the scale of the model then applied the scale. I adjusting the lamp size to 2 meters then set the strength to 5000. On my second attempt I set the Lamp size to 50cm but it made no difference. The render remains dark. If I change the lamp type to Hemi or Sun then it works fine (figure 4).
Weird thing is if I disconnect the world output node as seen in figure 3. but with the use nodes still enabled then I get this result. There is still some light on the hair but the face is completely black.