Working life of LED

- Sep 04, 2019-

temperature

When light is produced, heat is produced together, which affects the lifetime and the luminous flux of the LED. This is true for a single LED and for the entire LED module. Therefore, heat must be transferred through the best installation method or appropriate radiator. The basic principle is as follows: the lower the temperature, the longer the lifetime of the LED, the higher the efficiency, and the stronger the brightness.

Mechanical effect

There are many reasons for mechanical force. Mechanical forces may occur in the manufacture, assembly or operation of LED and in the use of materials that will form mechanical forces when temperature changes dramatically. If the LED is affected by these forces, it may have a negative impact on its working life, or even terminate its working life.

Consumption power

Each LED and each LED module can work within the specified current range. The lower the current in this range, the smaller the energy released by the LED and the lower the heat generated, which directly affects the working life of the LED.

lighting

Because the aging process of specific components is affected by the light emitted by the chip, the design of special LED shell plays an important role in this aging process. For many shell designs, because of the high intensity and brightness of the light emitted by the chip, the working time has only passed several hundred hours, and the built-in reflector has been seriously aging.

damp

LED itself is strong and durable, not easy to be affected by the outside world, good anti-vibration and not easy to damage. If used properly, humidity will not be a problem: it is not the LED itself that is sensitive, but the various metal parts, joints and electronic components in the LED module. They may be corroded, which can lead to module failure. Choosing the right material for the LED can prevent corrosion. In order to prolong the working life of the LED module as far as possible, moistureproof protection is absolutely necessary.

Chemical

Due to the different application sites, the pressure of the chemical impact on the LED is also very different. Therefore, various environmental conditions must be taken into account when planning the LED lighting system. The main factors that have a negative impact on working life are as follows:

Corrosive air (air with high sulfur dioxide content)

Coastal climate with moderate salinity

chemical industry

A swimming pool with moderate chlorine content

According to DIN IEC/PAS 62 717, the definition of working life is as follows:

The working life of a single LED module Lx is the duration when the luminous flux emitted by an LED module is higher than the specific percentage of the initial luminous flux under certain conditions. Example: Working life L70B50 means that during this working life, 50% of the luminaire flux is greater than or equal to 70% of the initial luminous flux.


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