Common Types of Bulbs
Homeowners typically use four different types of bulbs: incandescent, compact fluorescent, halogen and light-emitting diodes.
- Incandescent: These bulbs are lit by an electric current through a filament, which produces a warm glow.
- CFL: Compact fluorescent light bulbs are lit by an electric current sent through a tube with argon and mercury vapor, which produces cool light.
- Halogen: These bulbs are lit by thermal radiation from a hot tungsten filament, which produces a white light that resembles natural daylight.
- LED: Light-emitting diode bulbs, three times more efficient than CFLs, produce blue light when a voltage is applied to negatively charged semiconductors.
There are many more types of light bulbs and subcategories within each variety, but these four are most commonly used in modern home construction.