A light bulb is a device that produces light when electricity passes through it. It usually consists of a glass bulb filled with gas and a metal filament or LED components. When the electricity flows, it heats the filament or activates the LED, creating light. Light bulbs come in various shapes and sizes, making them suitable for different uses, from illuminating homes to providing light in street lamps. Light bulbs have revolutionized the way we live, allowing us to extend our activities into the night. They are often used in combination with lamps and chandeliers to enhance the ambiance of a room. With advancements in technology, energy-efficient options like LED bulbs have become popular, reducing electricity consumption while providing bright light.