What are LEDs?
LEDs, or light–emitting diodes, are semiconductor devices that produce visible light when an electrical current passed through them.
LEDs are a type of Solid State Lighting (SSL), as are organic
light–emitting diodes (OLEDs) and light–emitting polymers (LEPs).
Common LED colours 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 colour 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.
Coloured 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.
How is LED lighting different than other light sources, such as incandescent and CFL?
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.
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.