What kind of light bulbs do you have in your home?
There are three kinds of light bulbs used in most homes: Incandescent bulbs, variations of which have been around for over 200 years, the Compact Fluorescent Lamp (or CFL) has been around for over 50 years, and the Light Emitting Diode bulb (or LED) which is a relatively new kind of light bulb.
- Incandescent Bulb
Incandescent bulbs are the least efficient bulbs available today. They create light by having electricity pass through a filament until it becomes so hot that it glows and emits light. They are very hot to the touch, 90% of the energy they release is as heat, not light.
- Compact Fluorescent Lamp (CFL)
CFLs create light by having an electric current forced through a tube containing glass. The reaction of this creates UV light which gets transformed to visible light by a fluorescent coating on the inside of the tube.
- Light Emitting Diode (LED)
LED lighting is the most efficient lighting available today. They produce light with the movement of electrons though a semiconductor material that illuminates small light sources (LEDs). LED lights are cool to the touch, unlike other bulbs, because the heat is released backwards into a heat sink.