Lightsource
A light source is an object or region that emits electromagnetic radiation, primarily in the visible spectrum, though it may also emit non-visible wavelengths such as infrared or ultraviolet. Light sources can be natural or artificial. They may produce light through thermal radiation, electronic transitions in atoms and molecules, or luminescence.
Natural light sources include the sun and stars, which emit light across a broad spectrum due to
Artificial light sources are designed to convert energy into visible light efficiently. Common types include incandescent
Key properties include luminous flux measured in lumens, luminous intensity in candelas, and illuminance in lux.
In practice, light sources are selected to balance brightness, energy use, color quality, and environmental impact