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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

LED Street Lights

Posted by NaBa Green Energy Labels: , , , ,

Street Lights can be segregated based on the type of bulbs they use. Street light come in different flavors. Below are some of the street lights
  • Incandescent Street Light
  • Fluorescent Street Light
  • Mercury Vapor Street Light 
  • High Pressure Sodium (HPS) Street Light
  • LED Street Lamps
  • Solar Street Lamps using LED Lights
We are going to discuss mainly about the LED Street Lights. We all know that most of the street lights produce more heat and less light resulting in huge energy loss. Led lights works in contrast to other lighting systems. It produces more light and less heat, So the energy spent for lighting is more and you get more lumen's per watt (Refer Global Warming and Led Lights ). At the time of writing this article we where able to get 140 lumens per watt, Which is very high when compared to other sources of lights.

Advantages of LED Street Lamps

Led Street Lamps increases night visibility, It is because of
  • Higher color rendering
  • Higher color temperature
  • Increased luminance uniformity
As explained in my previous article the life span of LED is 1,00,000 hours provided the fixture is designed to dissipate the heat produced at the back of LED properly

LED street light if used with right optics will give enough power using very less electricity when compared to conventional street light lamps (Refer LED FAQ's).LED circuit will approach 80% efficiency, which means 80% of the electrical energy is converted to light energy. The remaining 20% is lost as heat energy. But in incandesant bulp 80% of electrical energy is lost as heat

Reduced maintenance costs: Although the cost of LED's are high but the return on invest can be achieved much quicker when compared to other street lights. With other street lights, the true cost of the bulb is the cost of replacing the bulbs and the labor cost and time needed to replace them. This can be eliminated by using LED street lights.

Mercury is not used in the manufacture of LED lights. Also the cost of producing LED with that of CFL is less there by reducing the carbon foot print even at the manufacturing stage.


The carbon foot print can be reduced more than 50% using energy efficient lights like LED. We at Naba Green Energy make three different street lighting products which are replacements for
  1. Replacement for 40 W
  2. Replacement for 70 W
  3. Replacement for 150 W
To get more information on LED lighting please visit link




Wednesday, February 24, 2010 | 0 Comments

Advantages of using LED

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

Using Hi Power LED (Light emitting diode) has lot of advantages. It improves

  • Color perception
  • Visual clarity
  • Productivity
  • Mood

Color Perception:

To understand the color perception let us first discuss in brief about how human eyes are built. Human eyes senses color using combination of rod and cone cells. Cone cells function in bright light detecting colors and Rod cells are better for low light vision. For humans, the visible spectrum ranges approximately from 380 to 740 nm. LED's have excellent color rendering index(Color Rendering is the property of light source that affects color of the object) of more than 90. So LED's can easily improve the color perception.

Visual Clarity:

LED typically have a high correlated color temperature of 5000k-7500k. Lamps with higher Correlated Color Temperature (CCT) values produce greater brightness perception than lamps with lower CCT of the same luminance. The color temperature value of led is equal to sunlight , approximately 6500k. So LED light gives visual clarity when you see an object.

Productivity:

LED lights if designed properly will reduce the eyestrain in work environment. Eyestrain is due to invisible light, flickering lamp and inadequate light. As there are no flickers and color temperature of LED is that of sunlight the strain on the eyes are reduced and thereby increased productivity.

Mood:

LED lights comes in different colors like red, orange, amber, yellow, green, blue and white. Different colors can change the moods of the occupants in the building thereby increasing thinking capacity.

When designing our lights NaBa Green evaluates all the parameter to give you optimum light to reap the benefits.






Wednesday, February 10, 2010 | 0 Comments

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