Light sources are objects or devices that emit light, which is a form of electromagnetic radiation visible to the human eye. Common examples include the Sun, light bulbs, and LEDs. These sources can be natural, like the Moon reflecting sunlight, or artificial, created by humans to illuminate spaces. Different light sources produce varying qualities of light. For instance, incandescent bulbs emit a warm, yellowish light, while fluorescent lights provide a cooler, bluish tone. The intensity and color of light can affect mood and visibility, making the choice of light source important in settings like homes, offices, and public spaces.