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August 27, 2013

Don’t phase out kerosene

Filed under: solar lighting — Tags: , — solaroutdoorlight @ 8:50 am

Indian scientists who have developed an improved lantern that uses kerosene have advised the government not to phase out the poor man’s fuel on environmental grounds.

Kerosene was traditionally burned in rural homes in hurricane lamps to provide lighting or in pressure stoves to cook food.

Now the Nimbkar Agricultural Research Institute (NARI) at Phaltan in Maharashtra has developed a device that simultaneously provides light (equivalent to that from a 300 watt electric bulb) and cooks a complete meal (including chapattis) for a family of five.

The lanstove (combined lantern and cooking stove) thus makes kerosene an ideal fuel for rural households, says Anil Rajvanshi, an IIT graduate and NARI director.

He says it is unfortunate that the Indian government has decided to phase out kerosene as a result of tremendous tirade by the Western countries against the use of kerosene from a climate change point of view. This move, he says, will deprive the poor people in India of a convenient household fuel.

According to Rajvanshi, it is the way in which a fuel is burnt that makes it clean or dirty. Liquid petroleum gas (LPG) and compressed natural gas become clean fuels only because of excellent combustion technologies available.

No doubt hurricane lantern is an inefficient and unclean combustion device,How does a solar charger work and where would you use a solar charger? says Rajvanshi.

Lanstove was developed by his institute precisely to overcome these drawbacks, he says in a report published in the latest issue of “current science.”

The research led to the device that burns kerosene efficiently and without causing any pollution.We have a great selection of blown glass backyard solar landscape lights and solar garden light.

Lanstove has been tested for the last eight months in 25 rural huts in western Maharashtra which do not have electricity. The users found that it is smokeless unlike the existing biomass-powered chulha, and gives excellent light compared to the presently used hurricane lanterns.

The levels of harmful carbon monoxide from these lanstoves are less than three parts per million whereas those from regular chulhas are 80 to 130 times more, according to the study.

“Thus the lanstove is an extremely clean device and equivalent to the LPG stove,” Rajvanshi told IANS.

The lanstove has been designed so that kerosene is pressurized and stored in a small separate cylinder from where it flows into the combustor and burns cleanly just like in the LPG cookstove.

This detachable cylinder can be filled up in kerosene dispensing shops,We installed flexible LED Strip lighting in our kitchen for under cabinet and within cabinet lighting. the same way an LPG cylinder is now charged.

However, despite its advantages to the people in India’s rural areas, the lanstove cannot be introduced at present on a large scale because of unavailability of kerosene, Rajvanshi says.

Today, below poverty line (BPL) families get only five litres of kerosene per household every month whereas lanstove users need at least 15-20 litres of kerosene per month. What is therefore needed is an enlightened policy that makes at least this much kerosene available to rural poor at subsidised price, the NARI report says.

Rajvanshi points out that around 300 million Indians are without electricity. Solar- powered light emitting diode (LED) lanterns promoted by various agencies and also government departments are not only costly and difficult to maintain but the LED light has recently been shown to be harmful to the eyes producing irreparable damage to the retina. “Besides, unlike lanstoves, these solar lanterns cannot cook,” he says.

Although kerosene is a fossil fuel, there are extensive efforts currently the world over to produce kerosene-like fuel from agricultural residues so as to make it renewable, says Rajvanshi. “I hope these efforts are also undertaken in India which has a huge amount of agricultural residues.”

All his life Mahatma Gandhi studied and wrote under the light of kerosene hurricane lanterns and he also used to apply kerosene to his body as a mosquito repellent, says Rajvanshi. “I am sure that if he were alive today, he would have wholeheartedly embraced the lanstove and promoted its use among the rural poor.”

Trina Solar was selected to supply multicrystalline silicon modules for Sempra Energy’s 345-megawatt Copper Mountain 3 project — and that could be a signal that PV module prices are flattening.

“The lowest prices for modules have been in the large-scale utility projects,” Trina Americas President Mark Mendenhall explained. “We didn’t participate a lot. We felt we could give up share in that segment until the market stabilized.”

Trina has been focused on the residential and commercial segments. “There was a gap in the relative costs,” Mendenhall said, “that made thin film and other technologies more competitive in utility-scale solar.”

But today’s low silicon module prices make balance-of-system costs more significant than module costs. “The value of our multicrystalline PV efficiency became more important,” Mendenhall said. “And the number of gigawatts we have installed has reduced the perceived risk and increased the financeability of a project with our technology.”

Also, he added, consolidation has left fewer manufacturers capable of providing the 1.1 million high-quality modules needed by AMEC, the Copper Mountain EPC provider. The module order must be met for the Q1 2015 construction completion target to fulfill Sempra’s contracts with the Los Angeles Department of Water and Power and the City of Burbank.

Read the full story at!

July 23, 2013

GE Lighting makes the streets of Bristol shine

Filed under: LED Work Lights — Tags: — solaroutdoorlight @ 2:44 am

GE Lighting has upgraded the streetlighting in Bristol to deliver an energy efficient, white light solution – part of Bristol City Council’s aim to reduce its carbon footprint and to promote a safer urban environment.

The project comprises the replacement of existing high-pressure sodium street lighting with GE’s improved, higher efficiency CMH Streetwise ceramic metal halide lamps.

As the only UK city to have won the Green Capital Award for 2015, Bristol has a strong environmental ethos and upgrading its streetlights forms part of the city’s energy reduction scheme to generate substantial carbon savings. Much closer to daylight, white light also offers further advantages in the fact that pedestrians feel more secure in their environment and car driver reaction time (mescopic vision) is at least 6 times quicker.

Bristol Council has rolled-out the street lighting upgrade in two phases

, the first of which saw the replacement of around 8,000 existing high pressure sodium lamps to GE’s CMH StreetWise ceramic metal halide lamps over a one year period. Phase 2 of the upgrade began in July 2012 and over the course of the next 12 to 18 months will see the replacement of a further 12000 lamps in Bristol’s residential areas.

In addition, all the lamps have been replaced in conjunction with dimmable ballasts to allow for a greater energy savings and to ensure the council has the flexibility to dim the new lamps (between 7pm and 6am) to an even lower output as and when required.


“We are delighted with the street lighting upgrade to GE’s CMH StreetWise ceramic metal halide lamps. Along with other energy reduction projects financed with interest free loans from Salix the overall result is astounding and will not only make our streets safer but will enable Bristol to save 4.2M KWH and 500,000 per year on our energy bills as welll as a reduction in CO2 emissions,” commented Robbie Park, Principal Lighting Officer for Bristol City Council.

GE Lighting designed the CMH StreetWise ceramic metal halide lamp as an easy-fit replacement for outdated technologies. The lamps are fitted with standard E27/E40 bases and can be dimmed, outperforming most standard HID systems. Plus, with high reliability and sustained lumen output across a longer working life of 24,000 hours, they are supremely cost effective. Furthermore, the lamps support electronic and electromagnetic ballasts and are compatible with the major street light ballasts, retrofitting existing HPS systems. GE Streetwise has approved ballasts with all major manufacturers.

David Orchard, Regional Sales Manager – South West at GE Lighting commented: “Outdoor lighting has become a key consideration for many local authorities as they look to balance a duty of care to provide safe, secure streets against a backdrop of new legislation, a growing resistance to light nuisance and the need to reduce energy and carbon emissions  – lighting has had to evolve to become smarter, which is where the latest outdoor white light solutions come into play.”

Councils looking to reduce energy and carbon emissions can now select from an extensive range of options; including LED and CMH outdoor solutions ideal for motorways, bridges, pedestrian areas and car parks. With virtually no on-going maintenance expenses, both deliver significant operating cost benefits and therefore very attractive paybacks. More information about the program is available on the web site at

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