hõõglampid

Hõõglampid, also known as incandescent light bulbs, are a type of electric light that produces light by heating a wire filament until it glows. The filament is typically made of tungsten, a metal with a very high melting point, and is enclosed in a glass bulb filled with an inert gas or a vacuum. When electricity passes through the filament, it heats up to a high temperature, causing it to emit visible light.

The process of producing light in a traditional incandescent bulb is relatively inefficient, as a significant portion of the energy is converted into heat rather than light. This is why incandescent bulbs are being phased out in many parts of the world in favor of more energy-efficient alternatives like LED and CFL lamps.

Despite their inefficiency, incandescent bulbs have been widely used for over a century due to their low manufacturing cost, simple design, and pleasant, warm light quality. They are also known for their instant-on capability and the ability to be dimmed easily. Historically, they played a crucial role in industrialization and modernizing society by providing artificial light for homes and workplaces.

The invention of the incandescent light bulb is largely attributed to Thomas Edison, although several inventors contributed to its development. Edison's improvements in filament material and bulb design led to a commercially viable and long-lasting incandescent lamp. Over time, various refinements were made to increase efficiency and lifespan, but the fundamental principle of heating a filament to produce light remained the same.