LED or also call light-emitting diodes, you should know that LED is the latest and most exciting technological advancement in the lighting industry, of course, know that LED appeared relatively recently and has gained popularity in our market by because of its many advantages such as high-quality lighting, long life, and endurance, without forgetting that LED is a Light source based on P and N semiconductor technology has a lifespan that goes up to reach 20 times longer than fluorescent or incandescent lamps. well, concerning light-emitting diodes, it is important to know that they are an essential element used in electronics for many years, of course, however, know that it is only recently that they have gained popularity thanks to high power LEDs, in addition to providing a light strong enough to be used as a substitute for fluorescent mercury lamps.it should not be forgotten that there are LED sources and modules on the market that are powerful enough to be used as infrastructure lightings, such as the street or park lighting, and even architectural lighting in office buildings, stages, and bridges. be aware that they are also useful as the main source of light in production plants.
Disadvantages of LED
Temperature dependence: you should know that the performance of LEDs depends mainly on the ambient temperature of the operating environment of course, in other words, these are thermal management properties. You must know that excessive control of LEDs at high ambient temperatures can cause the LED housing to overheat, which can lead to devise failure, so that’s why you should always be careful. also, an adequate heat sink is necessary to maintain a long service life, of course, this is why it is particularly important in automotive, medical and military uses also where the devices must operate at high temperatures, and well, for this which is from Toshiba, this company which manufactures electronic and computer equipment has produced LEDs with an operating temperature range of -40 to 100 ° C, and which of course is suitable for LEDs for indoor and outdoor use. outdoor in applications such as lamps, ceiling lighting, which makes it very useful.
The Light quality: be aware that most LEDs have spectra that differ considerably from a black body radiator like incandescent and very bright light. well, you should know that the peak at 460 nm and the trough at 500 nm can cause the color of the objects is perceived differently under a cold white LED lighting than the light of the sun or incandescent sources of course, moreover, because of metamerism, the red surfaces being made particularly bad by a cold white based on typical phosphorus LEDs. But the color rendering properties of common fluorescent lamps are often inferior to what is now available in advanced white LEDs, which is a disadvantage.
The Blue pollution: now we move on to another disadvantage, as you know cold white LEDs with a high color temperature emit proportionately more blue light than conventional outdoor light sources, well, you should know that the strong dependence on Rayleigh scattering wavelength means that cold white LEDs may very well cause more light pollution than other light sources, of course, this is why The International Dark-Sky Association advises against the use of white light sources with a temperature color correlated greater than 3000 K, unfortunately, this is one more disadvantage to add to the list.
The High initial price: As for the price, you should know that LEDs are currently more expensive on the basis of an initial investment cost than most conventional lighting technologies. well, know that in 2012, the cost per thousand lumens was around $ 6. At least one manufacturer claims to have reached $ 1 per kilolumen in March 2014. without forgetting the fact that the additional expenses result in part from the relatively low production of lumens and the necessary control circuits and power supplies. It is very important to rate the price, of course, that’s why the price is part of the LED disadvantage list.
The Voltage sensitivity: It is very important to know that the LEDs must be supplied with a voltage above the threshold and a current below the nominal value of course. moreover The current and the lifetime change considerably with a small variation of the applied voltage. without forgetting the fact that they require a current regulated supply and it is generally just a series resistance for the LED indicators. well, it is also a disadvantage that is added to LED.