The Reasons of LED Lights Decay

LED lights have covered large cities in large areas, energy saving and environmental protection, high light efficiency and long life are the reasons why people love it. However, some people still find that some LED lights have high brightness when they are first used, and after a period of use, their light intensity will decrease. In fact, LED lights will suffer from light decay. Although not as serious as that of traditional lamps, a qualified LED light will still be able to maintain 70% of the illuminance at the end of its life. This light decay is normal. And the LED lights with severe light decay will reach more than 40%, what is the reason for this?

The reasons of LED lights decay?

In general, there are two main factors for LED failure:

First, LED product quality issues:

1 Poor LED quality

The chip of the LED lamp is one of the important factors that determine the service life of the LED lamp. The material and specifications of the LED chips produced by some small factories are not relevant. Even if the packaging process is good in the later period, there may be dead beads and serious light decay Series of questions.

2 LED chip’s high temperature

The production process is defective, LED chip cooling can not well export from the PIN , resulting in LED chip temperature too high to chip attenuation intensified.

When the LED lamp beads are working, the individual lamp beads will be heated less, and the temperature of the bracket will not exceed 45℃. At this time, the life of the LED lamp will be ideal, but when the LED lamp forms a lamp group, the corresponding temperature will rise. High, it is not conducive to long-term use of LED lamps. For the problem of heat dissipation, one is to choose a good aluminum substrate to help better heat dissipation. Some high-power outdoor lights will design heat sinks. The design and material of heat sinks are crucial factors. Good heat dissipation The chip can dissipate heat faster.Another way is to increase the distance between the lamp beads, preferably the distance between the lamp beads is more than 25mm.

Therefore, after we understand the ideal working parameters of LED lamp beads, we try our best to enhance the functions of heat conduction and heat dissipation when designing lamps. Anyway, the lower the temperature, the longer the LED life.

In short, LED lights are afraid of heat, the higher the temperature, the shorter the LED life, the lower the temperature, the longer the LED life. The ideal working temperature of LED is of course at minus 5 ℃.But this is basically impossible. Therefore, consumers must understand the performance of LED lamps when choosing them.When it is used, it should be reasonably protected so that it can exert its optimal use effect and let it add luster to you.

Second, use environment of the light:

1 LED use with constant current drive, some drive decay because of LED drive voltage.Or, the drive current is greater than the rated drive conditions.

2 LED lights are used outdoors and are affected by environmental factors. If the manufacturer fails to seal and waterproof the lamp, the interior of the light source will be corroded by rainwater and acid and alkali substances. Affects the service life and light decay occurs.

Generally, it is strictly forbidden to cover objects during the working process. One is because the LED lamps are not good for heat dissipation, and the other is that they are prone to fire.

In total, there are many reasons for the decrease in LED street light intensity. For example, the thermal resistance of the LED chip itself, silver glue, and long-term continuous operation of the street lamp, if the heat dissipation module can not effectively dissipate heat, it will affect the LED life and light performance. As well as colloidal and gold wires are also related to light decay. However, the most critical issue is the temperature problem. Many LED street light manufacturers still pay attention to low-priced products, and do not pay special attention to heat dissipation. As a result, the long-term use of these LED street light products will cause serious light attenuation. Moreover, the heat dissipation efficiency of the heat sink of the LED street lamp decreases with time. This is due to the accumulation of dust and bird feces, which reduces its heat dissipation efficiency, which is very unfriendly to the lamp.

We pay great attention to the product quality of LED light fixtures. With the improvement of modular design, open design and the quality of heat dissipation modules, many problems have been solved. The IP66 waterproof level and excellent heat dissipation ability protect the LED slights, reduce the light attenuation and extend the service life. If you have any needs or problems, pls feel free to contact us.