LED stands for light emitting diode LIGHT EMITTED DIODE means. In fact, LED is a family member that follows a group of semiconductor diodes are.It is observed. Sometimes the light emitted by devices such as digital cameras can be seen that the wavelength of the light in the infrared spectrum taken with this type of LED infrared (IR) said. For the light emitted by the LED is visible to the eye should be in the range of visible light wavelength that depends on the frequency and the physical structure of the LED.

Based on the above it can be concluded that after making the first LED diodes for, LED infrared data transmission and remote control which tasks were undertaken. Gradually, researchers and experts were able to change the physical structure of the LED, managed to produce LED light with wavelengths in the visible light spectrum, respectively. Since the purpose of greater brightness white light used by the scientists sought a way to produce LED with a white to light that failed to produce an LED. This LED also light bluish white spread, in fact light white halo of blue light in it. Over the researchers were able to use a combination of three colors: blue, red and green together to achieve a single white light. Here was a way to gradually LED lighting industry. The conventional LED lighting little earlier than they were entitled. In 2003, it was announced that the luminous efficacy of 120 lumens per watt for 2010, we will achieve LED display and EPISTAR while in 2004, the company announced that 108 lumens per watt efficiency is achieved. Today, LED and lighting industry in various types and in various colors and lighting, and decorative lighting applications in addition to the production of LED monitors can also be used with different dimensions.
LED in the amount of exposure and shape into different categories such as: LED typical of {LED hat, Oval OVAL LED, matte and Bright} - Power LED POWER LED - LED SMS LED SMD LED - LED Power S AMD SMD POWER LED - LED, DC he COB LED - AMC he MCOB LED luminaires are classified.
LED Normal: This type of light emitting diodes usually have a cylindrical shape or square and stand tall and in a variety of single colors, three colors, RGB, seven colors and white, which in terms of the number of legs two legs, three base and four legs and are available in various diameters that are part of the first LED and low exposure. This so-called DIP LED display, ie on perforated boards are soldered.

Power LED: Power LED that can be said about the next generation of LED are like early LED monochrome, white and RGB 1W and 3W are available in the range. The amount of the LED light is very good and is in the range of 100 to 110 lumens per watt at 130 and 160 to 180 lumens new technology reached bills. Installing the LED on the motherboard PCB for SMD and to avoid damaging and burning the LED on a heat sink for heat transfer is used and given flow rate and power consumption to meet their driver, according to the board install. (of course, other groups and the heat sink LED drivers are also required). The LED lifetime compared to conventional LED and high luminous efficiency and lighting industries are widely used.

SMD LED: SMD stands SURFACE MOUNT DEVICE word and means the components installed on the surface. The LED POWER LED are also similar, with the difference that the smaller size and shorter legs and in sizes 5050, 3528, 3014, 5630, etc. are available. Another type of SMD and POWER SMD LEDs are. The structure of the LED display so that a series of LED and SMD fine on an aluminum plate placed and the LED with thin wires of gold in series connected to each other are actually a pack LED high power there comes. In general, the LED's heat losses are less and generally square or rectangular shape are produced. The LED lighting from 110 to 140 lumens per watt this is. The benefits of this type of tin-saving LED consumption and lack of human intervention in the production of printed circuit it is.

COB LED: COB word stands CHIPS ON BOARD means the chip is on board. The structure of the LED display so that a series of LED in small, low power on a board and module mounted the LED very similar SMD LED display, but the difference is that in SMD LED display, LED display with thin wires gold are connected to each other in series but in COB, light emitting diodes on a chip are mounted and integrated on a panel and here there is no gold wire. COB production are usually circular in shape and have the ability to scatter light. For example, a small supply LED can be up to 249 lumens per watt for 20 mA of current to generate light much brighter Vkhyrh produced if the COB approximately 161 lumens per watt for 350 mA of current production them. The reduced efficiency due to overweight and more water flow is achieved. In total COB LED optical efficiency than similar SMD LED, and generally lower COB to be used.

COB LED: COB stands MULTI CHIPS ON BOARD word means several chip is on board.used by several parts, each of which plays the role of a COB lamp that position gives them a higher wattage bulb MCOB. It should be said that these lamps because of the large surface area for use in systems FLOOD LIGHT SPOT LIGHT and even falling lights that are used in lighting are not suitable. MCOB mostly small bulbs are used in a variety of crystalline ceramic and aluminum are common.