Light bulbs are devices that produce light when electricity passes through them. They come in various shapes and sizes, with the most common types being incandescent, LED, and fluorescent. Incandescent bulbs create light by heating a thin wire, while LED bulbs use a semiconductor to emit light more efficiently. These handy inventions have transformed how we illuminate our homes and workplaces. By providing bright and reliable light, light bulbs help us see better and create a comfortable atmosphere. With advancements in technology, modern light bulbs are also more energy-efficient, saving both electricity and money on utility bills.