Lights Of The Future

http://v.mccont.com/ItemFiles/%5BFrom%20www.metacafe.com%5D%201827553.8343094.11.f lv?__gda__=1241095695_d417e35809ea0946a315b4bbea328c27 Save energy and money with compact fluorescent light (CFL) bulbs and fixtures. Look for the ENERGY STAR� label. Did you know that energy efficient CFL�s: - Last up to 10 times as long as regular incandescent bulbs? - Use up to 75% less energy? - Save you up to $65 in energy costs? **CFL�s require proper disposal--they contain small amounts of mercury that can harm the environment. Check your local recycling program for toxic waste disposal centers. Light Emitting Diodes (LED�s) are also becoming more popular. They last about 5x longer than CFL�s; do not contain mercury; deliver 6x the light per unit of electricity than incandescent; becoming more widely available. Light emitting diodes (LEDs) are semiconductors. Layers of highly purified chemicals are deposited in reactors on substrate �wafers.� These are diced (or the material is lifted off) to create individual �chips� (die). The chemistry determines the color.

When a typical light emitting diode (LED) is forward-biased light is emitted.� When the voltage difference across the poles is reversed, so that the high voltage is at the cathode and low voltage at the anode, it is reverse-biased and no light is generated.� Meanwhile, LEDs act as normal diodes in that a small leakage current is produced across the diode junction when it is connected in reverse.� In fact, the leakage current is directly proportional to the amount of incident light on the LED.� By measuring the time the internal capacitance takes to discharge (i.e. change from a HIGH to LOW logic state) we can determine the extent of a user's interaction with a particular LED or region of LEDs. � Through the precise measurement of incident light, the generic visualization system is implemented as a touch-sensitize LED panel.� By integrating multiple LED panels together a future implementation will be to implement an array of these LED panels to form the Interactive LED (iLED) Wall.� iLED can then be used as a visualization tool for engineering research and boundless other applications � educational tool, games, or even as an aesthetic enhancement.

Energy savings Safety Maintenance cost Accessibility for Obstruction Market Government incentives Flexibility of light source Digital control for colour Rugged light source Organic Light-Emitting Diode (OLED) Arrays The display of the future? Many think so. OLEDs function like regular semiconductor LEDs But with thin-film polymer construction: Thin-film deposition of organic, light-emitting molecules through vapor sublimation in a vacuum. Dope emissive layers with fluorescent molecules to create color.

Not grown like a crystal, no high-temperature doping Thus, easier to create large-area OLEDs OLED pros: Transparent Flexible Light-emitting, and quite bright (daylight visible) Large viewing angle Fast (< 1 microsecond off-on-off) Can be made lMore than 50 000 LED obstacle lights delivered since 1996 and only few failure caused by LEDs or other componets LED obstacle lights can survive even direct lightning strikes arge or small Maintenance free Very long lifetime Very low power consumption Very low overall cost of ownership the next few years should see the first effective LED solutions in specialised areas of the office, such as, reception and meeting areas, where more decorative effects are required. INTRODUCTION Due to recent and on-going power supply problems experienced in SA, regulatory bodies have announced the use of a power rationing scheme to help reduce the pressure on the national grid. CHALLENGES The main challenge confronting us is how to reduce the energy consumption with a sustainable demand side management. Temporary shutting down and implementation of pre-emptive load shedding has been met with negativity from all consumers and it has harmful effects which damage our economy and living standards. WAY FORWARD The only way to achieve a sustainable energy consumption reduction will involve the implementation of energy efficiency programs in all sectors. These programs typically aim at installing energy efficient devices that consume less energy but still provide the same service levels. This remaining slides will highlight a few of our energy efficiency programs and campaigns ���..

Drawback LED street lights are currently expensive, costing almost 5 times the amount of our conventional (High Pressure Sodium) luminares. Advantage LED street lighting technology have the potential to use up to 50% less

electricity when compared to the HPS systems. The cost of electricity is increasing rapidly and this is directly related to the generation capacity constraint that we currently experience. This increased cost affects businesses and ultimately affects the performance of the economy. LED radiation properties changes with forward current and temperature. Some little current fluctuations cause large result uncertainties Detector SNR and ADC error provide additional uncertainty for result Errors in LED positioning during measurement give an uncertainty that changes with signal derivative in diagram region LED angle value is the main factor that doesn't allow to receive equally precise results for different LEDs

LED are solid state semi conductor devices that can convert electrical energy directly into light. The inherent features of LED decide it to be the best alternative to conventional light sources and provide a wide range of application. It is used indoor and outdoor including parking points, street lights, highways, corporate offices, hotels, public buildings, restaurants, gallery, lounge, cars, sign boards etc. HOW IT WORKS: LEDs are essentially tiny light bulbs that fit into an electrical circuit, but they are lit solely by the movement of electrons in a semiconducting material. A diode is the simplest semiconductor device. It is made by bonding a section of a positively-charged material to a section of a negatively-charged material with electrodes on each end so that it only conducts electricity (in the form of free-moving electrons) in one direction whenever a voltage is applied to the diode. Electrons move in a series of fixed orbits around the nuclei of atoms. Whenever an electron absorbs extra energy from the added voltage, it jumps to a higher orbital, and when it returns to a lower orbital, it emits the extra energy as a photon -- a particle of light. LEDs are specially constructed to emit a large number of photons, unlike ordinary diodes, in which the semiconductor material absorbs most of the light energy before it can be released. LEDs are also housed in a plastic bulb to concentrate the light in a particular direction. BENEFITS: LED lighting consumes 50 percent less energy than traditional sources. It is four times more energy efficient than regular light bulbs because more of the energy is converted into light than is lost as heat. There is no glass or filament, as in a light bulb, so LED tiles would last forever, and the tiles are so rugged, someone can jump on them without breaking them. LED lighting also covers the entire color spectrum of visible light so lighting can change from one color, or tone, to another with just one touch of a control panel.There are intrinsic reasons for the popularity of LEDs as they are high energy saver, are pollution-free and have handsome payback period. Due to non-emission of infra red and ultra violet rays, LEDs do not attract bugs which other sources of light does. It also lasts 5 to 10 times longer than other conventional products thus eliminating the chances of frequent replacement. LED products do not contain mercury and do not have ballasts too. LEDs are future solution to lighting problems. The prominent feature of LED is fit and forget,� he said.

LED technology is already used in exit signs and traffic signals, as well as digital clocks plasma TV screens, and remote controls Philips Surpassing the limitations of conventional lamps and fixtures, Cellophane House is a five-story, fully transparent and sustainable house illuminated solely by LED sources as a provocation for the future possibilities of residential lighting. The development of led in last few years has been tremendous. The growth of led will grow from $ 5.0 billion in 2006 to $10.8 billion in 2010 and reach $ 17.4 billion in 2013. Our mission is to create a design with a significantly reduced carbon footprint, and LED technology helps us achieve that LED light will be the future of lighting , turely Performance trends suggest that LEDs have the ability to become predominant light sources, given their longer life, durability, non-toxic materials, lack of radiated heat and UV, and flexibility to accommodate wide-ranging fixtures and form factors. It 1. 2. 3. it

is with advantages: Low power consumption, saving up 80% evergy than traditional halogen bulbs Green, no pollution. It is solid state lighting Long use life. Up to 100,000 hours is means that for years, there will be no any addtional maintenance cost

For the heating problem, there are many solution so solve it. The powe of LED light is enough to light home, office, even street, it is no problem The only problem now is the cost. Its cost is still high. For example, our 4.5W LED Bulb (its lum equal to 24W halogen bulb), the cost will be about USD20 including freight charge form Hong Kong to the wolrd. How about this price? Can afford? I hope LED COST could be down soon, so the world will use LED lighting, that will make our earth more green and clean. I have a report about LED LIght Vs Halogen bulb at website, http://www.elecosnled-display-screen.com/about/news_detail.asp?newsid=45 LEDs are available in a huge assortment of physical sizes, efficacy ratings, and power ratings Efficacy and output vary greatly amongst the different color LEDs LEDs have many variables; there is no simple system to gauge relative output The good news: huge selection of choice amongst cost, output, efficacy, light quality, etc. The bad news: Many ways to cheat output claims Thanks to advances in physics, light-emitting diodes (LEDs) will soon move from traffic lights and electronics panels to home lighting, bringing dramatic energy savings, adjustable colors for ambiance, and light-shining furnishings.

ex.Lighting Science Group Corp. announced it has acquired Lamina Lighting Inc., which develops light emitting diodes (L.E.D.) engines and modules for $4.5 million in cash.

Some lighting executives are convinced that new lower-cost L.E.D bulbs with improved efficiency, will slowly substitute incandescent bulbs in homes, and that compact fluorescents are just an interim technology because of their large size, the unpleasant color of light, and the five milligrams of mercury in each bulb. Waste Management recently launched an online program to deal with the possible mercury leakage during recycling by offering a special bulb safe box for the price of $14.95. HOUSING That means replacing everything from the fluorescent tubes in offices and out front.The new LED lights use 48% fluorescent and high-pressure sodium

high-pressure sodium parking-lot lights to hallways to the spotlights on the flagpole less energy than the incandescent, lights they replaced.

the combination of the energy savings, reduced maintenance and disposal costs and the environmental savings demonstrate that LED lighting is now a real alternative to traditional lighting solutions.

SPEECH Among other things, they form the numbers on digital clocks, transmit information from remote controls, light up watches and tell you when your appliances are turned on. Collected together, they can form images on a jumbo television screen or illuminate a traffic light. Basically, LEDs are just tiny light bulbs that fit easily into an electrical circuit. But unlike ordinary incandescent bulbs, they don't have a filament that will burn out, and they don't get especially hot. They are illuminated solely by the movement of electrons in a semiconductor material, and they last just as long as a standard transistor.

LEDs started coming to the front due to their unique ability to use less power and last long, opposed to traditional light sources that used a filament for illumination. LEDs are one of the world�s most energy efficient light sources and the newest models deliver approximately 70 lumens per watt, using approximately 17% and 50% of the energy consumption of incandescent and compact fluorescent (CFL) lamps, respectively. The LED's, with a lifetime of over 50,000 hours, last more than 20 times longer than incandescent and 5 times longer than CFL bulbs, which lowers maintenance costs.