A light-emitting diode (LED) is a
semiconductor light source. LEDs are used as indicator lamps in many devices
and are increasingly used for general lighting. Appearing as practical
electronic components in 1962, early LEDs emitted low-intensity red light, but
modern versions are available across the visible, ultraviolet, and infrared
wavelengths, with very high brightness. Now, when talk about the lighting, we
think about these three letters, LED. But why people love LED light so much, it should be
time for finding the answers.
They do more for less. LED's are
efficient-producing a lot of light from a little power. For example, one 5-watt
LED can produce more light than one standard 75-watt incandescent bulb. The
5-watt LED could do the job of the 75-watt incandescent at 1/15 of the energy
consumption. LED's save energy and, therefore, money. This is because in LED
lights, 90% of energy is converted into light, while in incandescent bulbs 90%
of energy goes to heat and only 10% to visible light.
They last longer. LED is virtually
maintenance free - they don't have a filament that will burn out, so they last
much longer. A standard "long life" household bulb will burn for
about 2,000 hours. An LED can have a useful lifespan up to 100,000 hours! By
some sources, LED's can last for as long as 40 years. Imagine not having to
change a light bulb for years. There are LED products available this year that will
make frequent light bulb changes so 20th century.
It looks nice. The prime replacement for the
incandescent light bulb would be the higher-efficiency compact fluorescent, or
CFL. However, besides that there is toxic mercury in the design, it gives off a
strange, sometimes unpleasant color that even gives some people headaches. Not
the LED- its light is easy to see even in bright sunlight and can produce the
same soft, white light as a regular bulb. LED light can be illuminated and
change its light to many colors including a very recent addition of White and
Blue. Other is Green, Red, Orange and Amber.
没有评论:
发表评论