Wednesday, June 27, 2007

led light very useful for emergency

In 1960 led light has became available to the market of lighting today. During the old days lighting technology was mainly limited to incandescence and fluorescence.
Leds light consume less electricity and produce less of the parasitic by product heat

Initial LEDs light were of colour red, green and with yellow and orange. Led light are most used in traffic light. Today's there led light comes in many colours such as blue to produce a white SSL device. In 1993 a Japanese chemical industries company comes up with blue colours using gallium nitride and make possible to created white led light by combining the light of separate LEDs (red, green, and blue) or by placing a blue LED within a special package with an internal light. Led light are very useful for emergency where cars break down or a sign to show that the road under repairs.


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