The light bulb is an electric incandescent lamp. This bulb has a glowing metallic filament enclosed within a glass shell filled with an inert gas such as nitrogen. In earlier days, people used candles and oil lamps for light. Edison patented the first incandescent light bulb in 1880.

The incandescent bulb is the most commonly used light bulb and usually the least expensive. In the present day, we can see different types of bulb-like Incandescent, Halogen, typical fluorescent, Compact fluorescent bulbs, LED etc. Different types of bulb use different technology to manufacture the bulb and their lighting capacity is also different.

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