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What Is an LED Light?

Monday, 06 Dec 2010 11:52 AM

LED lights are lamps and lighting solutions that use light emitting diodes (LEDs). A light emitting diode (LED) is a basic semiconductor device that converts electrical energy into light. Although in use as electrical components since 1962, LEDs were used mainly for powering gadgets such as remotes, sensors, calculators, and digital watch displays.
 
With numerous experiments and reduction in cost, the last few years have seen increasing LED light use in the backlighting of television and computer screens, camera flashes, and LED light bulbs. All these are possible as LED lights have numerous benefits over conventional compact fluorescent lamp (CFLs) and incandescent light bulbs.
 
What is the advantage of LED?
LED light bulbs are more rugged and damage-resistant than incandescent light bulbs. An efficient system, LED light bulbs are finding use in a wide range of applications.
 
LED light bulbs are available in white, red, orange, amber, yellow, green, and blue LED lights. The color of the LED light depends on the semiconductor material used in the diode. Blue and white LEDs are slightly more expensive.
 
LEDs offer many advantages over traditional lighting systems such as longer life span, lower energy consumption, improved robustness, smaller size, faster switching times, and better durability and reliability. A group of LEDs is capable of producing high-intensity light.
 
Blue LED lights are produced by using the semiconductors gallium nitride and indium gallium nitride. Blue LED lights are being used for various purposes including burn therapy, forensic sciences, hunting, powering night lights, and many more. Blue LED lights are used in vehicle lighting by the U.S. police department and fire fighters, since they enable them to clearly see through fog during the winter.
 
In solar LED lights, solar cells and LEDs combine for solar-powered solid state lighting systems, which connect to an infinite power source; the Sun. Since the Sun is an intermittent source, the solar LED light system usually also includes a solar energy storage unit.
 
LED light bulbs and lamps are available in many forms, ranging from 5 watts to about almost 100 watts. Some LED light bulbs come with dimmers and even programmable light settings, which are popular with horticulturists and are also used in aquariums.
 
The cost of LED light bulbs is also coming down to about $10 to $20 for normal 12v LED lights, which are capable of producing light equivalent to that of a 60W incandescent bulb at about one tenth the power consumption cost.
 
An LED light bulb is expected to last for about 50,000 hours of use under normal use. LED light bulbs operate at low DC voltages, as low as 12 volts, or even lower. However, since LEDs are heat sensitive, they require the incorporation of a heat management system.

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