Who would have thought that an invention from the 60’s would be considered as an illumination of the future? The intense technological research has allowed the evolution of the LEDs and also the new devices that will use them. If you’ve read our article on LED TV, you already know how the application of diodes has raised the picture quality of televisions because they have a panel with thousands of lights, instead of having a single light source. To know more details about the new generation of televisions and see the comparison with the plasma television, accessLED TV, the sensation of 2010.
But What Is LED?
LED is the acronym for the term Light Emitting Diode. These small lights are semiconductor diodes with high capacity to emit light energy, produced from elements such as silicon and germanium, or salts such as gallium arsenide and gallium phosphide .
Baixaki has recently published a story about this small electronic component. Access LED: future lighting now available in the present and know more about the operation and applications of the diodes.
The benefit of LEDs lighting has hit the streets of cities. In 1990, the São Paulo Traffic Engineering Company (CET) began studies to analyze the feasibility of replacing the traffic light bulbs of some of the city’s main intersections with diode lamps.
How did the research idea come about? Because the replacement was already in progress in cities of the United States and Europe. Despite the delay, due to the lack of capital, CET / SP’s analysis confirmed the advantages of LED signaling to the point that, nowadays, we read news such as “Company launches LED traffic lights in Brazil”.
The investment cost approximately US $ 750,000 and returned in just 12 months, with a combination of the reduction of energy consumed by light signals and a decrease in the frequency of traffic lights maintenance.
Great savings on energy consumption
Light emitting diodes (LEDs) consume 15 to 20 watts versus 100 watts used by incandescent lamps with the same luminous intensity. In the overall picture, this results in a reduction of 80 to 90% of the energy consumed.
Increased traffic safety
LED traffic lights are brighter and brighter than those produced by incandescent light bulbs, causing no confusion on motorists and pedestrians due to the reflection of sunlight.
Reduced lamp change maintenance
The lens used at traffic lights is made up of numerous LED lamps, which work independently of one another. Therefore, the burning of a small number of LEDs does not totally affect the transmission of the light signal.
In addition, the life span of an LED is approximately 100,000 hours, that is, an LED lamp lasts 25 times longer than a conventional lamp.
We want to hear your opinion! Does your city have LED traffic lights? What do you think of the intense investment in LED technologies? Do not stop commenting!