An incandescent bulb is a type of electric light that produces light by heating a thin wire, called a filament, until it glows. This process occurs inside a glass bulb that is often filled with an inert gas to prevent the filament from burning out quickly. Incandescent bulbs are known for their warm light and are commonly used in homes and businesses. These bulbs are typically less energy-efficient compared to other lighting options, such as LED or fluorescent bulbs. They convert a significant amount of energy into heat rather than light, which can lead to higher electricity bills. Despite this, many people still prefer their familiar glow and color rendering.