LEDs are Light Emitting Diodes and will play an important role in solving
the world's increasing energy woes.
LED light occurs from a single diode, or an array of diodes, when connected
to an energy source. LEDs each contain a semi-conductor "chip" and their
color is determined by the material used to make the chip. When a charge
is applied to the diode(s), the electrons travel in only one direction.
As they leap across the chip, they are attracted to other charged particles
and when positive and negative charges combine, elements of energy are
emitted in the form of particles of light.
The incandescent light invented by Thomas Edison over 100 years ago
may soon be replaced by LEDs. This is evident as more and more traffic
ligfhts are being converted to LED fixtures, automotive manufacturers are
choosing them for both interior and exterior lights in new vehicles, and
LED flashlights are fast replacing traditional portable lights in popularity.
There is good reason. LEDs are brighter, they run cooler, they last far
longer and they use 1/10th of the energy of traditional incandescent or
even flourescent lights.
LEDs last 133 times longer than incandescent bulbs and 10 times as
long as compact fluorescents.
LEDs use only a fraction of the energy of incandescents.
LEDs are more durable than incandescent lights as they do not have
a filament that is easily damaged.
LEDs are cooler as they do not cause heat build-up; producing only
3.4 btu's/hour. Incandescent bulbs produce 85 btu's/hour.
LEDs last for years saving on replacement costs.
LEDs can save 80% of electricity costs in running traffic lights.
LEDs can provide light in remote areas in combination with solar energy
requiring fewer panels.