As LED lighting is now increasingly popular in architectural lighting, task lighting, medical lighting (particularly for use in surgical theatres), transportation led engine, entertainment, and even household lighting. This information intends to be a comprehensive guide with their utility, what the advantages that LED lighting possesses over other kinds of lighting and how to select a proper power source for the LED lights.
First, what IS an LED light? A light-emitting diode (LED) is an electric light source. LED's are on the basis of the semiconductor diode. When the diode is forward biased (switched on), electrons are able to recombine with holes and energy is released in the form of light. This effect is known as electroluminescence and the colour of the light is set by the vitality gap of the semiconductor.
LED's present many advantages over traditional light sources including lower energy consumption, longer lifetime, improved robustness, smaller size ( enabling LED's to be easily populated onto printed circuit boards.) and faster switching (LED's illuminate very quickly. An average red indicator LED will achieve full brightness in microseconds, and LED's found in communications devices may have even faster response times.). Thus their utility value is very high. Maybe the best advantage of all is that as the colour of the light depends on a certain variable (i.e.- the vitality gap of the semiconductor) thus LED's can emit light of an intended color without the usage of color filters that traditional lighting methods require. This is more effective and can lower initial costs for a vast selection of applications which previously used the color filtering process.
Further benefits of LED's exist, one of them efficiency of an LED is prominent. LED's produce more light per watt than incandescent bulbs, and wastage of energy is minimal, as LED's radiate almost no heat in the form of IR that may cause harm to sensitive objects or fabrics. Wasted energy is dispersed as heat through the foot of the LED. Further as light is emitted from a solid state material, greater impact moderation capability is present in the LED lights. Further, LED's don't contain mercury, unlike most fluorescent lamps.
But LED's are still more expensive, on an initial capital cost basis, than most conventional lighting technologies, and are very much sensitive to temperature and voltage. LED's should be furnished with the voltage above the threshold and a current below the rating. This can involve series resistors or current-regulated power supplies, and the proper function of the ability supply is an important element in creating maximum utility and longevity of the systems. If a lot of current passes through the semiconductor material forming the Diodes the LED will burn out! LED power supplies must, among others, provide Universal AC input, allowing the full selection of applications, Short circuit, over load, over voltage protection, an integrated dimming function, allowing the light levels to be adjusted to generate different effects.
And needless to say the safety of the LED power supply is a prime concern, to stop overheating, cooling should take place, and the most efficient type of this is by free air convection. And the ability supply must come fully equipped with an isolated, (preferably) plastic case that is resistant to external influences such as for instance water on order to protect it from harmful effects of water and dust.
If you are planning an LED lighting project, for your house, garden or even your office or your shop, a thorough research on the subject may be your absolute best starting point. And as LED's are extremely sensitive ensure you use a proper and top quality power supply. Speak to your local electronic engineer or a reputed seller of LED lights and power supplies for more information. A vast variety of online LED and LED power supply vendors exist as well. Their official websites offer top quality information and specifications to tailor an answer for the lighting requirements.