INFORMATION ABOUT LED
LED lighting which is the blessing of modern technology. In the field of lighting LED is the most Safer, Greener and Energy Saving technology so far invented.
It is your decision now by replacing conventional bulb and tube light with LED bulb and tube light to make the planet greener, to create a safer working place for your workers, and save energy which will save your cost and help our nation to overcome the acute shortage of power.
A light-emitting diode (LED) is a two-lead semiconductor light source. It is a p–n junction diode, which emits light when activated. When a suitable voltage is applied to the leads, electrons are able to recombine with electron holes within the device, releasing energy in the form of photons. This effect is called electroluminescence, and the color of the light (corresponding to the energy of the photon) is determined by the energy band gap of the semiconductor.
An LED is often small in area (less than 1 mm2) and integrated optical components may be used to shape its radiation pattern.
LEDs have allowed new text, video displays, and sensors to be developed, while their high switching rates are also used in advanced communications technology.
LEDs are produced in a variety of shapes and sizes. The color of the plastic lens is often the same as the actual color of light emitted, but not always. For instance, purple plastic is often used for infrared LEDs, and most blue devices have color-less housings. Modern high-power LEDs such as those used for lighting and backlighting are generally found in surface-mount technology (SMT) packages.
Conventional LEDs are made from a variety of inorganic semiconductor materials. The following table shows the available colors with wavelength range, voltage drop and material:
LED lighting efficiency has greatly advanced through technology innovation over the last several decades. Efficiency of Incandescent and halogen tungsten lamps are 12-24 lumens per watt, fluorescent lamps are 50-70 lumen per watt and sodium lamps are 90-140 lumen per watt. The result of this is poor efficiency as most of power consumption is a result of the heat generated by these styles of lamps. LED lighting efficiency will reach upwards of 200 lumens per watt while maintaining 90% efficiency. This will be achieved while delivering benefits such as excellent color rendering index, narrow light spectrum, and no UV emission resulting in no need for filtration.
Achieving the same light output, the power consumption of LED is only 1/8 of that for the incandescent lamp, and 1/2 of that for the fluorescent lamp.
Using electronic light field emission based lighting has many disadvantages. Such as the filament is apt to become hot, the heat will be in aggradation and the light will attenuate. This is not an efficient light source. If these lamps had to pass today’s certifications, they would fail. Seesmart LED based lighting solutions utilize small volume, lightweight, epoxy packaged to withstand high strength mechanical shock and vibration. The average lifetime is 50k hours. The lifetime of LED based lighting can be 10 years or more based on hours of daily operation. Utilizing Seesmart LED solutions result in greatly reduced maintenance costs, capital intensive inventory of lamps and ballasts, increases productivity and effectiveness of current staff and brings the opportunity for utility-based incentives.
High reliability & safety:
Lucky LED products offer advantages such as low heat emission, no heat radiation, low temperature light source, much cooler to the touch, lighting color and angle can be controlled accurately, lighting color is less intensive and damaging to the eye, does not cause headaches, and no mercury, sodium or other hazardous substances used. The integrated microprocessor can control the light intensity, adjust the lighting mode and realise the combination of light and art in a finished product.
LED lighting is a solid-state product. This offers such features as vibration resistance, hi shock value, durability and enables the use of recyclable materials due to its production of convective heat versus radiant heat. This results in fewer lamps in landfills, as they will not break, shatter and the long lifespan of the finished product. The light is also much easier controlled and will not cause light pollution like other light sources. It is very well controlled and can be re-claimed and placed where needed. The light source is small in size and can be combined for high power applications when needed.
It is simple to be developed into portable, thin and short compact lighting products. Indeed the energy savings is a major contribution in the implementation of LED, however the environmental impact of using this light source is exponential. The use of recyclable materials in our finished products, the cradle to cradle lifecycle, No hazardous gases or filaments, long life span, efficient power supply integration, low heat radiation, significant reduction in carbon footprint for every LED implemented and when integrated with smart controls, the energy savings becomes even better. Although it is more expensive than the traditional light sources, the energy saving for one year can offset the cost of LED light source and create a short Return on Investment (ROI).
LEDs are utilised in many industries for many things. The applications of this efficient and environmentally-friendly light source are endless, however, there are 5 main fields of application: automotive use, backlight sources for consumer electronics, display screens for advertising, electronic equipment, and general lighting.
Uses for the interior of automobiles include indicator lights on dashboard gauges, audio status lights, security status lights and warning signals. Automobile exterior usage includes third brake lights, the left and right rear lamps, turn signals, etc. Currently many European series vehicles including Audi and BMW integrate high power LEDs.
The mobile phone is the largest market of integration for SMD (surface mount diode) LEDs. An estimated 400 million mobile phones are sold annually. One mobile phone takes two LED backlight sources and six SMD LED key lights. As a result, mobile phones create a demand for 3.2 billion LEDs per year.
The LED screen has become the new display medium for advertising and information. It is commonly used in concert, arena and trade show venues. Its popularity has prompted the rapid technological development of large-scale integrated circuits. Compared to plasma- and LCD-based displays and traditional media such as neon lights, LED displays offer advantages such as high brightness, dynamic visual display, high reliability, low energy consumption, long service life, display content diversity, high durability, and low maintenance costs. LED display screens have been widely adapted in various fields.
Due to attributes such as low power consumption, small size, and long life, LEDs have become the preferred light source on various electronic equipment. Today, LEDs have been integrated as warning lights and indicators on most electronics.
LEDs are being used in advertising billboards, illumination of commercial building exteriors, landmark buildings, bridges, roads, town centers and landscape lighting because of the numerous advantages they offer. Their long life, rich color, and easily-controlled features with integrated electronics offer a scalable lighting solution. As technology continues to bring rapid improvements in luminous efficiency and as cost compression persists, applications expand rapidly. Many airports, subways, hotels, shopping centers, and individual homes feature LEDs now. The integration of LED-based solutions into traffic lighting has been successful and is also growing rapidly.
For more application please see: Applications