There are many arguments which can be given for switching to solar-powered street lighting. First of all they take power from sunlight, secondly they don’t give out any CO2 emissions, thirdly they render an off-the grid source of lighting during in an emergency situation and fourthly they employ efficient LED-based light which don’t direct insects towards it. Sharp Corporation has declared projects to roll-out two fresh models of solar-powered LED street lights. They are available in the Japanese market. These models are having the additional bonus of integral Seismic Motion detectors. These detectors can determine the existence of earthquakes of 5 or greater on the Japanese seismic scale. These detectors also react by changing over to full illumination for two nights.

The first solar energy LED Street light by Sharp was brought out in October 2005. The most advanced models put up an important betterment in luminosity. The 160W LN-LW3A1 is the powerful one. It features a luminous flux of 1,800 lumens. That is approximately six times greater than the former model i.e. LN-L19ZA. It has the equal capacity to give light output as of a regular 32-W fluorescent security light. This was claimed bySharp. The light is very bright. It could easily be distinguished the general facial features of a person on a dark street in night at a distance of equal to four meters.

The other model performs the same at a distance of 3.7m. The less effectual LN-LS2A1 model has a nominal output of 80 W, which is its best possible level. It features luminous flux of 1,200 lumens. Both of the above mentioned models employ Sharp’s proprietary solar (photovoltaic) electric components and high-intensity, long-lasting mercury free LEDs. It keeps on working about 10 years before they demand replacement. They require a 12 volt, deep-cycle, sealed lead battery. That renders sufficient power in reserve to produce the lighting for a week without sunlight.

In terms of cutting down gas emissions, Sharp guesses that the LN-LW3A1 model gets rid of approximately 48 kilogram of CO2 discharges per year. The comparison is made with the units (LN-LS2A1) power-driven by conventional utility sources, which eliminates 44kg per year.
The LEDs do not give off UV. This keeps down the number of insects that accumulated in the surroundings. While fluorescent or incandescent lights run to draw in insects because they make ultraviolet light in the 350nm wavelength range.

The power to detect earthquakes is especially applicable to the Japanese market. Sharp lays the Japanese market for fresh installations at about 100,000 per year. The seismic motion sensing element is placed in the support pole of the main unit. It turned on full nighttime illumination for two days, when it finds earthquake above five on the Japanese seismic scale.

Philips has demonstrated the 2nd contemporaries of its Wake-up Light. The demonstration was carried out at IFA 2008. On the other side, Dutch consumer electronics brand Lenco is also exhibiting a multi-colored advance on the similar idea. Both lights are configured to mimic the natural action of awakening with the sunlight. Hopefully, make it little bit more comfortable to in awakening up and getting out of bed in the morning.

A recent survey directed by Philips revealed that 9 out of ten consumers accepted to hitting the short sleep button on their alarm clock prior to make them ready to awake and come out of bed. To treat this matter, the Wake-up Light is a morning simulator that wakes you in a natural style with artificial sunlight. The body is lightly awakened the way nature does. It begins from almost half-hour before your demanded wake-up time. It starts giving off light which step by step gains in intensity level. It works as if simulating the coming up sun in your sleeping room. The main aim is that your body will be lightly arisen to awaken. In this way you will be freshened up and more vigilant when you at last open your eyes.

The first edition of the Philips Wake-up Light was brought out in 2006. It was a slightly less conventionalized designing. Its new ergonomic pattern signifies that it is now smaller in size. The good thing is that the light strength is made sufficient to employ as an eco-friendly reading light making use of the energy saving light bulb.

The Lenco Wellness Clock Radio adopts a same principal. However it uses an orb figure and different colors. The 7-color rainbow light dome also has the choice to wake to a bell, the radio, or three dissimilar tunes. To assist you awaken, the light on the dome comes into being when your alarm speaks. The clock radio has liquid crystal display. A Neodym speaker and alloy speaker grill for a best sound reproduction. It is power-driven by two AAA electric batteries.

There is a need to advance it in some ways. Therefore we are trying to design it in a sturdy and strong in its construction and make an authentic arrangement that will really stay up above for months.

The test continued going on between 28 and 31 July. UK Ministry of Defense remained involved in that experiment. The 30kg Zephyr was operated by remote control. It made a flight at the height more than of 18km (60,000ft). It continued flying on autopilot and thru satellite communication. It tried out a communications load having a weight about 2kg.

At first glance, the propeller-driven Zephyr appears to be exactly some other model aircraft. It is even set up by hand. This “pilotless” craft with its 18-metre wingspan contains best available technologies.

Its construction employs ultra-lightweight carbon-fiber material. The aircraft continued flying on solar power - produced by amorphous silicon solar panel - thin as sheets of paper. These are pasted over the vehicle’s wings by glue.

To work in the night, the propellers are provided energy from lithium-sulphur batteries. These batteries are filled up with energy throughout the day under sunlight. Much of work is required for power storage and light-weighting down the arrangements,” told by Mr. Kelleher. He said that Lithium sulphur is advantageous for its energy density. It is more than double as compared to the most beneficial substitute technology - lithium polymer batteries.

Zephyr has proved that it can withstand in the extremes of temperature. It was tested in the very hot 45C heat at the surface level in Arizona’s Sonoran Desert and also to the minus 70C at heights of more than 18km (60,000ft).

The technologists from the Farnborough-based company are at present cooperating with the American aerospace jumbo Boeing. Their joint collaboration is on a defense project codenamed Vulture.

This would see the largest plane in history go for the sky. The energy provided by the sun. It would be able of containing a 450-kilo (1,000lb) load. QinetiQ is also preparing UAV technology for non-military uses.

A UK-based company constructed solar-powered plane which made up a new world endurance record. The test carried out was not official one. It was a flight of unmanned (remotely controlled) aircraft.

The Zephyr-6 remained up in the air for more than 72 hours. At night it got power from the batteries which were recharged daytime in the light of the sun. The flight was a presentation for the US military.

It was a Try to discover new forms of technology which could be used to back up the troops on the land. Craft like Zephyr may build ultimate standard of perfection programs for reconnaissance. They could also be used to convey information in the battlefield.

Chris Kelleher who is working in UK defense and research company QinetiQ told some useful facts about that. He said that Unmanned Aerial Vehicles (UAVs) is very much advantageous as compared to conventional aircraft and even satellites. The biggest advantage is perseveration. It means that you would be there all the time.

The latest experiment was carried out at the US Army’s Yuma Proving Ground in Arizona. The Zephyr made a flight for 82 hours, 37 minutes; it was continuous flight. This flight breaks the previous official world record for remote-controlled flight. That record was built by the US robot plane Global Hawk. It flew continuously for 30 hours and 24 minutes.

It also broke its own previous best of 54 hours. That record was made by Zephyr last year. However, the Yuma labeled it as an unofficial. The reason is that QinetiQ did not engage the FAI (Federation Aeronautique Internationale) as a participant in the whole activity. FAI is the world air sports federation, which approves all record efforts. The US Department of Defense financed the presentation flight. It was a part of their Joint Capability Technology Demonstration (JCTD) programme.

This programme is designed to encourage the technologies which the American commanders wanted to have with them in the field. Mr. Kelleher said that we believe Zephyr is very close to be used practically in field. It will take maximum of two years to get what we are proposing for.