Portrait Lighting Setup poster to be helpful. It contains 24 different portrait lighting setups using a variety of lighting gear and lighting patterns. Click the image to see it up large. Also check out some of the further reading.
These different types of lighting create different gradients and colours of light giving an image more meaning and depth. The way the light is enables the image to be more interesting and direct to what you want for your shoot.
I love bubbles, innocence of childhood pic Photograph We Dream by Jake Olson Studios on Jake shot this gorgeous shot with a Canon EOS Mark III and a Focal Length of His settings were a Shutter Speed and an Aperture with an ISO of