Using LEDs as a replacement for incandescent and fluorescent bulbs in portable and mobile devices such as flashlights and vehicle lights, as well as stationary lighting in the home and office. Known as "high-brightness LEDs" (HB-LEDs), they draw considerably less power and are up to 90% more efficient than incandescent and halogen bulbs. In addition, although claims are made for some bulbs lasting 30 years, one can expect approximately 10 years for an LED bulb under normal usage.
In Their Infancy
As of 2011, LED bulbs are considerably more expensive than incandescent bulbs; however, prices are expected to decrease dramatically within the next decade. Companies are experimenting with numerous designs as there is more than one way to make LED lights. For example, a blue LED and yellow or red phosphors create white light, or red, green and blue LEDs may be combined. See color temperature and LED.
The LED bulb on the right draws 3.5 watts, but delivers the equivalent light of the 45 watt incandescent bulb to its left.
Instead of the 7 watt incandescent bulb in the typical night light, this LED uses 0.3 watts. The blue arrow points to the single LED; the red arrow shows the light sensor.
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