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About LED lighting
- Sep 13, 2018 -

The LED (light emitting diode) is a semiconductor diode ,also  an electronic component, and was developed several decades ago. However, as a lamp, as we know and use, it is only a few years in the market and is constantly evolving.

 Here  are, briefly, the most important facts in simple terms:

 - What is an LED?

 A semiconductor device that can pass current in one direction only. If he current flows in the forward direction, it emits light radiation.

 

- What kinds of LEDs  (chips) are there?

 

SMD (Surface Mounted Device): The LED is soldered directly to the PCB. Currently the most common variant  in use. The advantage  over traditional wired LED lies in better heat dissipation and less space.

 

COB (Chip on Board): The LED is applied directly to the substrate, thus an "onboard" solution. The advantage is even higher packing density and a more homogeneous light output compared with SMD chips, since the individual points of light are almost not visible.

 

The future belongs to COB chips because of their higher packing density . The thermal  challenges are overcomed  with special ceramic used.

  

- What to buy? SMD or COB?

At the moment there are very good products on the market with SMD chips that have already gotten through a few years of test runs. Apart from that, they are still slightly cheaper than branded products with COB chip.


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- LED lifetime

The wildest rumors of up to 100,000 hours are being told here. Theoretically, these operation hours are possible, but it usually fails especially in low-priced products,mostly  electronics (chip driver) and bad temperature management.

Realistically, branded products have up to 50,000 hours of operation. The difference to conventional lamps is that LEDs lose luminosity much more slowly with the growing number of operating hours. If we speak of, for example, 50,000 hours of operation, this means that the LED is still owns 70% of its original brightness. Conventional HQL lamp loses luminosity after about 2000 hours massively.

One should imagine something like this like a flashlight  when the battery starts to weaken slowly.In the  LED technology we use terms like lumen depreciation or degradation.

In 90% of cases ,for the failure are responsible electronics or poor thermal dissipation.

 

- What are the differences to cheap LED lights?

Here is hidden of the most important factors. It is through the downright flood of LED lamps and luminaires in recent years , that the customer was made very insecure and  also disappointed with short lifetime of LED products without any warranty. As with many technical devices,it can be said in general,that branded high-tech products with high quality components (especially drivers) are clearly the better choice. Our industrial and commercial products have already been used successfully several times in various application areas and have a failure rate of less than 1%. Besides that, you also have a contact person who will quickly and easily complete guarantee settlement in case of failure of the lamp.

Especially in commercial LED range the saying "Who buys cheap, buys twice" is true 100% .


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- When is a LED light efficient?

 

Generally what we mean by efficiency is the ratio of luminous flux (lm) to the employed performance in watts (W). (Details about the terms in Help and Support)

This aspect plays a big role in the current LED technology, because the more efficient a LED bulb is, the more light can be used with the specified performance gain. Pay attention to the fact that it makes a huge difference whether is reflector is used, or an optic to concentrate ligh. Any type of reflector unnecessarily consumes power, so you have to pay the electricity bill without any equilvalent gain.

 

In current LED lights,  the question of the efficiency scores much higher  than the question of the lumen.

 

A good product emitts light with help of quality optics as directly as possible (calibrated beam angle) , to bring it where it is needed. So the product choice reveals itself through logic,through consideration of the construction method and area of application.


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