LED light is a semiconductor light source. They are gaining popularity because they are more energy efficient. Mainly used for indoor, street & home lighting, they come in various brightness & designs to suit ones needs. LEDs are available in wide range of colors from 2700K to 6500K which are dark yellow, mild yellow and ultra white. LED lighting fixtures offer endless colour possibilities to enhance one’s environment. Because of the infinite colour patterns, these products are ideal for entertainment, architectural and retail applications. The demand for these lights is rising because of its efficiency and cost effectiveness. The future of household and commercial lighting is definitely LED light & soon it will be everywhere – in our homes, street lights, outdoor signs, and offices, replacing the traditional incandescent lighting.
A light-emitting diode (LED) is a special type of semiconductor device that emits visible light when an electric current passes through it. It has two sides – one with an abundance of electrons called “n-type semiconductor” & the other with bunch of holes that need to be filled by electrons known as “p-type semiconductor “. With the help of these p-n junctions, these semiconductors can control the direction of the flow of electricity. The LED works on the principle that when electrons lose energy, they move from a higher orbit to a lower orbit. The energy lost is in the form of light photons. The color of the light emitted depends upon the frequency of the light photon released. The higher the frequency, the greater is the energy release. Gallium nitride is the light emitting ingredient in LEDs. It is used in the sapphire-based blue and green LEDs. Its practical application is in traffic signals & in lasers in high-definition DVD players.
LED TV is an LCD TV that uses LEDs to illuminate the display. these new sets use LED backlights rather than the fluorescent-type backlights used in most other LCD TVs. LED-backlit LCD TVs cost twice more than standard LCD or plasma TVs. Because of the slim line design of these LED tvs not only is less packaging used, but the vast reduction in overall weight means reduced transport and fuel costs. Most of the LED TVs are mercury free making them extremely eco friendly.
xit Sign is an important legal safety requirement, in case of any emergency like fire in any building. An LED exit sign is an illuminated sign that uses LED light to illuminate the word “EXIT. The traditional incandescent & fluorescent technology that are used, consume large amounts of energy & also require frequent maintenance. Since these signs operate 24*7, there is a need to replace incandescent bulbs with efficient models with long lives to help reduce maintenance cost and effort. They offer savings of up to $300 per sign in reduced energy, materials, and labor costs as compared with standard incandescent models. LED exit signs are an array of very small LEDs either red or green in colour arranged in a line or circularly. Many exit signs come with a battery backup since they need to remain lit at the time of emergency, when a building’s power is interrupted. It is a good option that buyers should look for. LED exit signs work at 120V or 277V. Exit sign manufacturers have made these products available at very competent prices. They are also easy to install. LED exit signs need to be approved for use by UL (Underwriters Laboratories) and should be compliant with local and federal building codes.
Siemens has planned to increase its Environmental Revenues to Euro 40 Billions by 2014 which is quite a big jump considering the large base.GE is its biggest competitor which is also rapidly increasing investment and research into Renewable Energy.Areva,ABB,Samsung,LG,Hyundai,Toshiba,Sharp,Panasonic,Mitsubishi are other industrial giants looking to rapidly increase revenue from Clean Technology.Siemens has a definite technological and incumbent advantages however the competition is quite formidable.Siemens has made important wins recently in the field of high speed railways,new generation high voltage DC electricity transmission,offshore wind etc.But it lacks size and scale in the fields of nuclear and solar energy and has little presence in the area of Energy Storage as well.While Siemens has bought Soliel in the Solar Thermal field,it lacks a Solar PV product portfolio.Siemens however remains a good long term safe green investment in a volatile cleantech sector.
Siemens as a part of its Energy Efficinecy Efforts will go on a Green Makeover of its Office Locations in India.LED Lightining and other measures will be adopted to save Rs 3 crore in Energy Costs annually.15% of its current Energy needs will be cut by spending around $2.2 million in the next 2 years with a payback time of around 3 years.Siemens hopes to establish its Green Credentials in the Green Building Category by showcasing its inhouse efforts in Energy Efficiency.Note Energy Efficiency is the cheapest way to cut carbon emissions and is the lowest hanging fruit in mitigating Climate Change.It is perhaps the only Green Sector which does not require a subsidy to be economic.India is on a massive infrastructure building spree with $500 billion expected to be spent over the next 5 years.Green Buildings will go a long way in reducing India’s growing carbon emissions and will save money as well.