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Showing posts with label LED lights. Show all posts
Showing posts with label LED lights. Show all posts

Solar LED Street Light Vs AC LED street light

Posted by NaBa Green Energy Labels: , , , , , ,

As we all know LED's work only on direct current. Any led street light that is manufactured today converts alternating current to direct current before it can light up the LED's using drivers(Drivers are power supply for an LED Light, much like a ballast is to a Tube light ). So What is the difference between AC LED street light and Solar LED street light?

Solar LED Street Light:

As described before any LED works on DC supply. In this scenario street light takes power directly from the batteries usually a 12 volts or 24 volts battery based on the application. Based on the level of the current in the batteries the intensity of LED's varies, which may destroy the LED's. To solve this we use a driver in between the batteries and the LED's which will regulate the voltage and current based on the LED requirements also the driver helps to avoid over drain in the batteries. 

AC LED Street Light

In AC street light LED's  the alternating current is converted into a direct current where in the current is made constant and the voltage changes on the configuration of LED's used vice versa can also be done where voltage is constant and current is variable.

 There are many ways to build these drivers we can either use microprocessor or simple ac-dc circuit using diodes. The cost and longevity of the street light depends on the driver and components used as most of the LED's in the market available today have 40,000 to 60,000 hours life.

In my next blog I will write more about driver types bye for now.




Friday, August 16, 2013 | 0 Comments

Global Warming & LED Lights

Posted by NaBa Green Energy Labels: , , ,

Global Warming is defined as the increase of the average temperature on Earth. As the Earth is get hotter, disasters like hurricanes, droughts and floods will be frequent as per the research.

As per the research, global warming proportionately increases with increase in green house gases like

  • Carbon dioxide
  • Methane
  • Nitrous oxide

Some of the major cause of global warming is

  • The major source of carbon dioxide is the power plants. These power plants emit large amounts of carbon dioxide produced from burning of fossil fuels for the purpose of electricity generation.
  • About twenty percent of carbon dioxide emitted in the atmosphere comes from burning of gasoline in the engines of the vehicles.
  • Buildings, both commercial and residential represent a larger source of global warming pollution than cars and trucks. Building of these structures requires a lot of fuel to be burnt which emits a large amount of carbon dioxide in the atmosphere.
  • Deforestation kills the lungs of the earth

Tips on reducing global warming

Easiest and fast way of reducing the use of electricity is to move to high energy efficient lights like CFL’s. It uses very less energy compared to incandescent bulb. To reduce the power consumption even further we can use LED based lighting.

LED lamps can be used in
  • Office Lighting
  • Shop Lighting
  • Industrial Lighting
  • Hospitality Lighting
Advantages of using LED Lights

  • It lasts Longer than compact fluorescent lamp and much more longer than incandescent lamps.
  • LED are solid state devices, so they do not have filament. They are not damaged as easily as the other type of lamps and can withstand jarring and bumping.
  • They produce very less heat when compared to incandescent lamp. LED produces 3.4 btu’s/hourcompared to incandescent lamp producing 85 btu’s/hour
  • Mercury and Lead Free, No mercury is used in LED’s
  • LED lights are more efficient because it uses less electricity and gives more power. During this time of writing the article LED’s where able to give 140 Lumens per watt when compared to 13.8 Lumens/watt Incandescent lamp.
  • Cost of Ownership for LED is less compared to other lights. A 100-watt Incandescent light bulb uses 101.5 watts of electricity. Over a period 50,000 hours it will use 5,075 kilowatt-hours of electricity in addition to replacing it 50 times with a new bulb. To get the same lumens LED lamp will use 540 kilowatt-hours of electricity. Even though the upfront cost of LED is high but the cost of ownership is less.
  • LED Lamps are best suited for remote areas as it takes up less electricity so it can be used with solar panels replacing generators or running long electric lines.
To get more information on LED lighting please visit link



Tuesday, February 02, 2010 | 0 Comments

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