The element known for its use in light bulbs is tungsten. Tungsten is a dense metal with a high melting point, making it ideal for filament applications in incandescent light bulbs. When electricity passes through the tungsten filament, it heats up and produces light. Tungsten’s durability and ability to withstand high temperatures allow it to last longer than many other materials when used as a filament. While incandescent bulbs have become less popular with the rise of more energy-efficient alternatives, tungsten remains a critical material in the history of lighting technology.