Set up your model near a window, and see how the color of light changes throughout the day and alters the effect of your photo.
While there are many types of artificial light that you can invest in for your studio, natural light is a great option for portraits, even when you are shooting inside. Set up your model near a window, and see how the color of light changes throughout the day and alters the effect of your photo. If you do use outdoor light while indoors, make sure to turn off your indoor lights, as they may be two different colors and can create an uneven tone. Use a light-colored backdrop or lightbox so that the light will reflect off of it, brightening up the overall composition.