An incandescent light bulb is a type of electric light bulb that produces light by heating a filament wire to a high temperature until it glows and emits visible light. In short, an incandescent bulb relies on electricity to heat a wire that generates light. They’re one of the earliest and most common types of electric light bulbs and are found in many households and workspaces alike. As opposed to a bright white light, incandescent bulbs produce a warm yellowish light, making them ideal for creating a gentle ambience in a room.