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LED Lights

• 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

Benefits Of LEDs• Efficiency:LEDs are extremely energy efficient and consume up to

90% less power than incandescent bulbs. Since LEDs use only a fraction of the energy of an incandescent light bulb there is a dramatic decrease in power costs. Also, money and energy is saved in maintenance and replacement costs due to the long LED lifespan.

• Longevity:LEDs have a lifespan of up to 60,000 hours compared to 1,500 hours for incandescent bulbs. An LED light will last over 7 years (constant use) before needing replacement. On average, LED bulbs last 10 times as long as compact fluorescent bulbs, and 133 times longer than typical incandescent bulbs. Long lifespan of LEDs will dramatically reduce maintenance costs and lower long-term operating costs compared to traditional incandescent and fluorescent tubes.

Benefits Of LEDs• Durability:LEDs are solid state lighting devices that utilize semiconductor

material instead of a filament or neon gas. An LED light is a tiny chip encapsulated in an epoxy resin enclosure, which makes LEDs far sturdier than traditional incandescent light bulbs or fluorescent tubes. Since LEDs don't use fragile components such as glass and filaments, LEDs are able to withstand shock, vibration and extreme temperature.

• Environment:LEDs are made from non toxic materials, unlike fluorescent lighting that uses mercury that may pose a danger to the environment. LED’s are also recyclable and considered “green” or Earth-Friendly.

• Color:LED lights are offered in a variety of base colors such as Red, Green, Blue and Amber. Because traditional incandescent light bulbs use filters to produce colors, they are extremely inefficient. LEDS can be blended together to produce millions of color options.

Applications Of LEDs• Automotive:

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.

• Backlight Sources: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.

Applications Of LEDs• Display Screen:

The LED screen has become the new display medium for advertising and information.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.

• Electronic Equipment: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.

• General Lighting: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.

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