2009-04-01 P & R Packet - Laserfiche WebLink

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LED Basics What is an LED? LED is the common abbreviation for a light-emitting diode. Each individual LED consists of a semiconductor diode that emits light when a voltage is applied to it. Unlike incandescent or fluorescent lamps. which create light with filaments and gases encased in a glass bulb. an LED is a semiconductor device. which emits visible light when an electric current passes through it. Advantages: . Durability and long life - LEDS in lighting fixtures can provide over 100.000 hours in solar applications. In comparison. an incandescent light bulb lasts approximately 1.000 hours. . Energy and maintenance savings - can be powered by a solar array and require little maintenance because of their long life. . Better quality of light - provide more than twice the luminous efficacy (lumens per watt) of incandescent lighting. . Safer - LED systems are low voltage and are generally cool to the touch (energy is delivered in the visible spectrum). . Smaller flexible light fixtures - resistant to vibration and shock and because of their size LEDS are useful for lighting small spaces. . Durable - LEDS have no filament to break and can withstand vibrations. . Environmentally friendly - LEDS do not contain mercury unlike florescent and mercury vapor lighting. which is considered hazardous to the environment. Not all LEOS are the same LEDS come in many form factors. These affect their operation. Q /Q.~ .. :'~i Small Group Large Bubble LEOs Structure Bubble LEOs ~ ~ LEOs promise to transform the way we light the world That promise is found in LED's ability to save energy. reduce maintenance costs. and change the way we look at our entire lighting infrastructure. LED system performance depends not only on the performance of individual components. but also on how they interact. Poor integration can lead to premature failure of LED-based lighting systems. Sol LED systems optimize integrated system performance. which means our LED systems will live up to their promise of long life. energy savings and reduced maintenance. Sol is at the forefront of the LED revolution for street lighting Using our extensive experience in solar lighting. our engineers have developed a family of LED products. which are specifically designed to capture the power and efficiency of this advanced solid-state technology. Delivering Performance and Dependability The unique characteristics of LED performance have been addressed with specific heat dissipation features. Because LEDS last longer. the labor and expense of multiple lamp changes is reduced. Maintenance costs are lower and this provides reduced total cost of ownership. 10