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.
Photography Lighting Tips ; Photography gear can get quite expensive. Even if you have a large budget there are so many different items that you'll always have to decide what is a priority and what is not.
I wanted to pin this photo to see a professional set up for using lighting gels. Here there is technology used including a stand with the lighting gel over the light which is being bounced onto a stand with lines in to created shadow on the model.