The quality of light changes with softbox size
Maybe you don’t have a softbox. However, the principles here are applicable to any system of diffusing light. Light behaves in a predictable way no matter what its source. You can also see from this video that the hardness or softness of light is related to the size of the light source. In general a smaller light source produces harder light. Enjoy this short video (4 mins).
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Visit our Light and Lighting page to see our full resource list.