There is a huge difference between shooting in natural light and shooting in a studio because, in a studio, one has full control over lighting. Although it is not always easy to achieve the lighting you are looking for, you can experiment and change the way the lights are set up until you get the desired results.
There are many lighting techniques used for shooting portraits and each technique is employed to evoke a different mood in the image and it depends on what the photographer wants to show through their image. One of these is the “High Key Lighting Setup” that produces images that are almost free of dark shadows and the highlights are the dominant areas in the image.
Photo by Engin_Akyurt
What Is High Key Lighting?
High Key photographs have a lot of white and light tone areas and very little mid-tones and darks. This is achieved through high key lighting that is set up strategically in a way that the tones nearer to the mid range tones become almost white, while the whites are very white. The lights used are too bright so that they blow out all or most of the harsh shadows and other darker tones; in other words, the aim is to reduce the amount of shadow detail .
Photo by Erwin_1968
Where Is This Technique Applied?
High key lighting is used for portraits and still life photography to deliver a positive or cheerful feeling. It is also applied in product photography as it makes the product stand out and gives it a high-quality look. High key is also the preferred lighting method when photographing humorous and comical scenes.
How Is The Lighting Set Up?
Key light refers to the main light source that illuminates the subject and there are many ways in which high key lighting can be set up. The basic would be to have at least three lights, where the key (main) light is positioned at an angle of about 45 degrees to the subject, while the other two background lights are positioned to illuminate the background to make it completely white. It is best to use a neat and smooth white backdrop (preferably linen or 9 ft wide roll of white paper, to avoid reflections) so that the background is free of any specks.
Note: You don't have to stick with 45 degrees, experiment with various angles starting from 15 degrees onwards. Some setups even have the light in front of the subject.