Examples of Broad & Short Lighting | eHow.com http://www.ehow.com/list_6642358_examples-broad-short-lighting.html
Short lighting involves setting up lights so that the side of your subject’s face or surface that is farthest from the camera receives the most light. This creates the illusion of a narrower, slimmer face and is very useful in portrait photography. The reason for this is that because of the lights’ positioning, the face side nearest appears darker and almost “shadowed,” whereas the side facing away is illuminated. Short lights are also excellent for emphasizing features to create a dramatic floor. If you want to emphasize wrinkles, freckles, a scar, dimples or chiseled features, short lighting is the ideal option. When using this technique, make sure the majority of the face is in the shadow. Remember the key light (main light) is the dominant light source for this dramatic effect. When posing the subject, turn their face toward the light but not so much that the light falls straight on the face as this will wash out the effect.
Broad lighting illuminates more of the face—the portion that is facing the camera. This is essentially the opposite of short lighting. This will give the face a fuller appearance and works well when highlighting the subject against a dark background. Have your subject turn their head away from the light, exposing more of the lit face to the camera. This also makes the photo have a flatter appearance; there won’t be many shadowing effects.