LED lights may suitable for Enery Saving!!

February 4, 2009 at 12:01 am Leave a comment

LED lights can help to save billions of kilowatt hours of electrical demand and also help lower electricity bills

led-bulbs    led-tubes    mr16_48led_small

A team of scientists at the University of Cambridge has found a production method that could lead to cheaper LEDs within a few years.

LED lights are a technology that most EcoGeeks are hoping to see in widespread distribution. LED lights can be even more efficient than compact fluorescent lights, and they don’t contain mercury like CFLs do. LEDs also have a much longer lifespan, and can operate for 10 times longer than fluorescents and 100 times longer than incandescents. They’re just still a little expensive, up to $100 / bulb.smd_ball_clear_small

One problem with producing LEDs is that the substrate typically used for LEDs is sapphire, rather than silicon, which can be used for many other semiconductors. Many LEDs are made from gallium nitride which is grown into crystals at a temperature of around 1000 C (1832 degrees F). Unlike other electronic components, which can be fabricated on a silicon base, gallium nitride shrinks faster than silicon when it cools, which leads to cracking and failure. Sapphire has a rate of shrinkage and cooling that closely matches the LED compounds, which makes it a suitable substrate.

ledsThe University of Cambridge team’s development is a method to make LEDs incorporating aluminum gallium nitride, which shrinks much more slowly as it cools, and allows the production of LEDs on silicon wafers like other components. “A 15-centimetre silicon wafer costs just $15 and can accommodate 150,000 LEDs making the cost per unit tiny.”

With the commercialization of this process, inexpensive LEDs may become available, and a superior alternative for lighting can help save billions of kilowatt hours of electrical demand and also help lower electricity bills.

Very impressive, considering that my current  lightbulbs tend to burn out after three months.  So I think LED lights are more energy efficiancy and suitable than ordinary incandescent as well as CFL bulbs. It is very useful like our country and let’s  hope, it’ll be soon  available on our local market  very soon……..


Entry filed under: आफनै कुरा, Electronics & gadgets, technology.

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