Natural and artificial light portraits differ in the source and quality of light used to illuminate the subject. Natural light relies on sunlight, offering a soft, diffused quality that can create an organic, authentic feel, though it changes with time and weather, giving photographers less control. In contrast, artificial light uses man-made sources like studio lights or flashes, allowing for precise control over intensity, direction, and color, enabling consistent and tailored effects, from soft and flattering to dramatic and stylized. The choice between natural and artificial light depends on the desired aesthetic, setting, and the photographer's creative vision.