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Showing posts with label Chennai LED Lights. Show all posts
Showing posts with label Chennai 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

Comparison of Incandescent, CFL and LED Lights

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

In this article we are comparing the cost and some of advantages and disadvantages of  LED, Compact Florescent Lamps and Incandescent Lamps.

Incandescent  Vs LED's Lights:

Our high power LED bulbs can save 85% - 90% electricity cost. For example, our 3W and 5W LED bulbs can replace 20W and 40W incandescent bulbs.

CFL and incandescent bulbs:
When compared to incandescent bulbs, compact fluorescent bulbs burn 10 times longer on average. CFLs with an Energy Star rating use less energy, about 75%.

Pros and Cons of CFLs
  • CFLs take longer to get warm and produce a colder light than incandescent bulbs.
  • Manufacturers responded to customers who complained about the low quality of illumination produced by CFLs, by developing a new generation of lights that resemble incandescent light bulbs.
  • A major disadvantage to using CFLs is the mercury found in every bulb. If the bulb breaks, it can be hazardous to everyone in the home if you don't get rid of it properly. Cleaning up a single broken bulb sometimes requires contracting a hazardous materials specialist, and can cost thousands.
Advantages of LED
LED Lights use less wattage (2-10 watts) than CFLs and don't produce much heat.They can be used for 6.8 years continuously before "dying," the equivalent of 60,000 hours. Unlike CFLS, LEDs don't contain mercury, which is a huge advantage. Please visit Advantages of using LED for more information.

Incandescent Light
Incandescent light is a source of electric light that works by a incandescence which mean emitting visible light as a result of being heated.

Efficiency (lumens/watt) - 10-17
Color Rendering Index (CRI) - 98–100
Color Temperature (K) - 2700 –2800    

If we use 60 watts bulb a incandescent light will consume.
The Energy usage per annum = 21,900 watts
Electricity cost of 60 watts per annum = Rs 111.56
The life span of incandescent light from 750 to 2500 hrs. We should also add the cost of replacement of the light.

Compact Fluorescent light(CFL)
Compared than incandescent light it produce more visible light , life span also more that is 10,000 hrs
Efficiency (lumens/watt) - 50-70
Color Rendering Index (CRI) - 65-88
Color Temperature (K) - 2700–6500 k

To calculate how much electricity we are consuming by CFL light. If we use 14 watts ,
The energy usage of watts per year = 5110 watts,
Electricity cost of 14 watts per year = Rs  26.04
It contain mercury so manufacturing cost is little more than others also the hidden costs like replacement cost.

LED lights:
The life span of Light Emitting Diode's are longer compared to  CFL & Incandescent lights.
Efficiency (lumens/watt) - above 80
Color Rendering Index (CRI) - greater than 90
Color Temperature (K) –5500-7500 k    

To calculate how much electricity we are consuming by  LED lights. If I use 7.5 watts ,
The energy usage of watts per year = 2737.5 watts
Electricity cost of 7.5 watts per year = Rs 13.94
It is amazing to note how much electricity cost can be saved by using LED lights compared than other lighting.

This calculation clearly shows that incandescent bulbs are the most expensive overall. And CFL lights also most cost effective but the biggest drawback is CFL is its mercury content. Mercury pollution is still one of the big problems which can threaten the health of people, fish, and wildlife everywhere, from industrial sites to remote corners of the planet.

It’s time to get away from 100 year old energy-wasting technology and start saving your money and helping to waste less energy. We at NaBa Green take it very seriously when it comes to energy saving.





Friday, March 26, 2010 | 0 Comments

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