Artificial light refers to illumination produced by human-made sources, as opposed to natural light from the sun or moon. Common examples include light bulbs, fluorescent lights, and LED lights. These sources are widely used in homes, offices, and public spaces to enhance visibility and create ambiance. The invention of artificial light has significantly transformed daily life, allowing activities to continue after sunset. It has also played a crucial role in various fields, such as photography, theater, and architecture, enabling creative expression and functional design in ways that natural light alone cannot achieve.