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LEDs

LED lighting differs from incandescent and compact fluorescent lighting in several ways. When designed well, LED lighting can be more efficient, durable, versatile and longer lasting.
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The type of application for the LED

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The base type used for LED's

To replace an incandescent bulb is to compare the light emitted, or lumen output, of the products

Lumen Output:

  •          40W Minimum lumen output: 450
  •          60W Minimum lumen output: 800
  •          75W Minimum lumen output: 1100
  •          100W Minimum lumen output: 1600

The minimum lifetime of the bulb, measured in hours

Special requriements for application

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The light color emitted

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LED lighting products use light emitting diodes to produce light very efficiently. An electrical current passes through semiconductor material, which illuminates the tiny light sources we call LEDs. The heat produced is absorbed into a heat sink.

Common LED colors include amber, red, green, and blue. There is actually no such thing as a “white” LED. To get white light, the kind we use for lighting our homes and offices, different color LEDs are mixed or covered with a phosphor material that converts the color of the light. The phosphor is the yellow material you can see on some LED products. Colored LEDs are widely used as signal lights and indicator lights, like the power button on a computer.

LEDs are now being incorporated into bulbs and fixtures for general lighting applications. LEDs are small and provide unique design opportunities. Some LED bulb solutions may look like familiar light bulbs and some may not, but can better match the performance of traditional light bulbs. Some LED light fixtures may have LEDs built–in as a permanent light source.

 

Source: http://www.energystar.gov/index.cfm?c=lighting.pr_what_are

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