Author Archives: C-G

An LED Bulb That Lasts 20 Years

A new LED (light-emitting diode) from Philips promises to last 20 years – more than 25 000 hours. The LED light bulb was launched commercially in stores on Earth Day.

For more than one hundred years, Thomas Edison’s incandescent light bulb has been on the market. Though providing excellent light quality, incandescent light bulbs are notorious for low energy efficiency: About 1/10 of the electrical energy that is put into the bulb is actually converted into light – the rest ends up as heat-waste.
Philips Led Bulb 20 Years
Won the Department of Energy Award

The reason why Philips has built the new LED bulbs in the first price was to win the U.S. Department of Energy’s L Price competition. This was an initiative brought on the table by the U.S. DoE to aware people of the incredible inefficient incandescent light bulbs, encouraging them to switch to more energy conserving alternatives.

Philips won the competition back in early August 2011; however, they did not release their prize-winning LED bulbs on the market before a week ago, on April 22.

How Much Does It Cost?

The net price of the new LED from Philips is currently at $60, which is several times greater than what you would have to pay for both an incandescent and a energy-saving light bulb (CLF).

On the other hand, the lifetime is about 25 times as great as incandescent light bulbs, which typically only lives around 1000 hours. The increased energy efficiency of a LED also has to be taken into account.

Estimations show that if the new LED light bulb replaces an incandescent light bulb and is used 4 hours a day, $8 is saved every year in electricity costs. Replace all incandescent in your house with the new LED and the savings increase accordingly. This means that after 7.5 years, the initial cost of the LED is paid down saved in terms of reduced energy costs – with another 12.5 years remaining on the lifetime.

There are still literally a ton of incandescent light bulbs that are in use today. If every 60-watt incandescent was replaced by the new LED, the U.S. would save almost four billion dollars every year. Imagine how much energy is wasted.

Written by Mathias Aarre Mæhlum. Read more about energy efficient light bulbs, as well as green energy technologies at his blog, Energyinformative.

Source: CBS

Best Conditions for Generating Solar Energy

Solar panels use PV (photovoltaic) cells that convert sunlight into electricity. Assessing whether your property’s roof is in a good position to generate solar power is essential before committing to installing any solar energy technology.

Roof position

Your roof will need to face south or within 90 degrees of south and should be in a relatively sunny position. If your roof is overshadowed for part of the day then this will generate less power. As well as this your roof needs to be structurally sound and in a fit enough state to be able to support the weight of the panels.
The Energy Saving Trust advises that your roof should be at a pitched angle of between 30 and 50 degrees from the horizontal for best performance. If you have a flat roof, panels can be attached to a frame tilted at the optimum angle.

Housing Energy Advisor suggests that you use free online solar angle calculator to calculate the best angle for each month of the year and then work out an average. Alternatively, you could make the most of the summer sunshine by calculating the optimum angle for June and setting your panels in that position. This would be the best option if you want to produce as much energy as possible to sell back to the national grid. A third option would be to set your panels at the optimum angle for the winter months. In this scenario, it would be likely that you would still be able to produce enough energy for the summer months, but this will give the additional benefit of reducing the amount of energy you need to buy in the winter. Unfortunately this would also reduce the amount of surplus energy you’ll be able to sell.

Weather conditions

Solar energy systems will produce energy all year round, but will produce significantly less during the winter months. Solar panels can still generate energy even on a cloudy day and the Energy Saving Trust even estimates that a system can still generate up to a 1/3 of the energy on a cloudy day that would usually be produced on a sunny day.

Regular amounts of rainfall are essential to the efficient operation of solar panels, as this cleans off any dust and dirt that could settle on them and could prevent the sun’s rays from being efficiently harnessed. This also helps to keep the panels cool, which benefits the panels as they operate with greater efficiency at lower temperatures.

Guest Article by Amy Catlow.

Hydrogen Road Tour ’09


Hydrogen Road Tour 2009 brings fuel cell vehicles to the West Coast. Traveling 1,700 miles from Chula Vista, California to Vancouver, British Columbia, the Hydrogen Road Tour 2009 highlights the communities where fuel cells and hydrogen stations are entering early commercial markets.

28 Cities 2 Countries 9 Days

Continue reading


Green Grass

Green Grass

Organic is another term very much heard of these days. Organic food stores, Organic clothing, organic makeup etc… the list is long.
What is Organic? To many it means a return to the way things were 100 years ago when man lived off what the land provided and took care of it; nothing artificial, no enhancements, no fertilizers and no pesticides – basically a return to natural way of life. Continue reading

Solar Energy


Solar Panel

“Solar” means ‘from the Sun’. Even before the advent of modern civilization man has been depending on the Sun for warmth and light. Sun was and is worshipped by many of the old world religions and was a main god in all of the ancient civilizations. Sun light makes life on earth possible. Solar energy starts the food chain in plants by helping in photosynthesis. Continue reading

Why Use Alternative Energy ?

i.   Alternative energy is eco-friendly.
ii.  Alternative energy reduces green house gases
iii.  Alternative energy reduces carbon-footprint
iv.  Since 1973 America has paid almost 7trillion dollars of its wealth to pay the OPEC member countries for fossil fuel!
v.  Alternative energy reduces the usage of one a precious commodity these days- water!!Which is used for cooling in fossil fuel based power generation.
vi.  Alternative energy not only helps to save the planet for your children and grandchildren, but also helps reduce your energy bills in the long run.
vii.  The Government does help out with tax breaks and subsidies when one uses Alternative Energy.
viii.  Green pricing programs allow electricity customers to express their willingness to pay for Alternative energy development through direct payments on their monthly utility bills.
ix.  Alternative energy systems once decommissioned the area can be taken back to the way it was without much hassles.
x.  Alternative energy sources such as the Sun and wind are never going to run out, while oil and coal will.

Alternative Energy Sources

Bio Diesel

Bio Diesel

Bio-fuels are basically derivatives from Bio-mass which literally means living matter which can be living or recently deceased. The following fuels are defined as alternative energy fuels by the Energy Policy Act (EPAct) of 1992: pure methanol, ethanol, and other alcohols; blends of 85% or more of alcohol with gasoline; natural gas and liquid fuels domestically produced from natural gas; liquefied petroleum gas (propane); coal-derived liquid fuels; hydrogen; electricity; pure biodiesel (B100); fuels, other than alcohol, derived from biological materials; and P-Series fuels. Continue reading

WIND ENERGY- harnessing the power of wind.



Moving air is wind! Wind is the flow of air or any gas from one area to the other as a result of pressure and temperature differences. Simply put, heated air rises and cool air rushes in to fill that area thus creating movement of air-wind. Anything that moves generates kinetic energy. Wind energy has been harnessed since ancient times, be it to ride the seas or keep oneself cool. It has also been used in windmills to run mills for centuries. Wind energy is a renewable and clean source of energy. Continue reading