Wednesday, May 4, 2011

LED Residential Lighting

The most recent addition to the array of residential lighting options is LED-based lighting. An LED, or light emitting diode, is a semiconductor-based device that emits light due to the change in energy of electrons in the semiconductor material as a result of an input voltage.

The two key advantages of LED lighting are energy efficiency and lifetime. While lighting efficiencies of incandescent bulbs are around 3%, LED bulbs are much more efficient, emitting much more light per watt. A 12 watt LED emits more light than a 60 watt incandescent. Recent LED-based bulbs have efficiencies similar to those seen in fluorescents, without the environmental issue of mercury that is a concern with compact fluorescent bulbs.

One of the biggest advantages of LEDs is their lifetime, which typically approaches 20,000 hours. LED bulbs also have a quicker start time than compact fluorescents, which have a delay between when they are switched on and when they actually begin to produce light.

Source: Leonardo ENERGY

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