The chemical symbol for the element commonly used in light bulbs is "W," which stands for tungsten. Tungsten is utilized primarily for making the filaments in incandescent light bulbs due to its high melting point and ability to withstand heat while maintaining durability. The process of passing electric current through tungsten filaments causes them to glow brightly, producing light. Though modern lighting has evolved with the introduction of LEDs and CFLs, tungsten remains integral in traditional incandescent bulbs. Its unique properties allow for effective light production while minimizing the risk of breakage.