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What Are the Factors Affecting the Quality and Light Attenuation of LED Lamps?

With the development of science and technology, the light sources of lamps are becoming more and more. LED is one of the common light sources, and it will also be affected by external factors. The following solar street lamp manufacturers will talk about the factors of LED lamp quality and light decay?First, choose what kind of LED white light.

What Are the Factors Affecting the Quality and Light Attenuation of LED Lamps? 1

This is very important. The quality of LED white light can be said to be a very important factor. For example, similarly, the 14mil white segment chip of Jingdian is taken as the representative. The LED white light encapsulated with primer, white light glue and packaging glue made of ordinary epoxy resin is illuminated in an environment of 30 degrees. After 1000 hours, the attenuation data is 70% of the luminous maintenance rate; If it is packaged with class D low aging glue, the aging time per thousand hours is 45% under the same aging environment; If class C low aging glue is used for packaging, the aging rate per thousand hours is 12% under the same aging environment; If class B low aging glue is used for packaging, the aging time per thousand hours is 3% under the same aging environment; If class a low aging glue, under the same aging environment, the aging of 1000 hours is 6%.

Secondly, the working ambient temperature of LED lamp beads.According to the aging data of a single LED white lamp, if only one LED white lamp is on and works, and its ambient temperature is 30 degrees, the bracket temperature of a single LED white lamp will not exceed 45 degrees. At this time, the life of this led will be ideal.If 100 LED white lamps are on at the same time and the interval between them is only 11.4mm, the bracket temperature of the LED white lamps around the lamp stack may not exceed 45 degrees, but those led white lamps in the middle of the lamp stack may reach a high temperature of 65 degrees. At this time, led beads are a test. Then, in theory, the LED white lights gathered in the middle will decay faster, while the LED white lights around the lamp stack will decay slower.

Anyway, we should know that led is afraid of heat. The higher the temperature, the shorter the LED life, and the lower the temperature, the longer the LED life. The ideal operating temperature of the LED is of course between minus 5 and zero degrees. But this is basically impossible.Therefore, after we understand the ideal working parameters of LED beads, we will strengthen the functions of heat conduction and heat dissipation when designing lamps as much as possible. Anyway, the lower the temperature, the longer the LED life.Thirdly, the working electrical parameters of LED lamp beads are designed.

According to the experimental results, the lower the driving current, the smaller the heat emitted by the LED white lamp. Of course, the smaller the brightness. According to the survey, in the design of LED solar lighting circuit, the driving current of LED is generally only 5-10ma; For products with a large number of lamp beads, such as more than 500 or more, the driving current is generally only 10-15ma, while the driving current of general popular LED application lighting is only 15-18ma, and few people design the current above 20mA.The experimental results also show that under the driving current of 14mA, and with the cover airtight, the air temperature inside reaches 71 degrees, the low decay product has a time decay of zero in 1000 hours and 3% in 2000 hours, which shows that the use of this low decay LED white lamp has reached its maximum limit in such an environment. No matter how big it is, it is a kind of damage to it.

What Are the Factors Affecting the Quality and Light Attenuation of LED Lamps? 2

Because the aging board used for aging has no heat dissipation function, the heat generated when the LED works basically cannot be transmitted to the outside. This is proved experimentally. The air temperature inside the aging plate has reached a high temperature of 101 degrees, and the surface temperature of the cover on the aging plate is only 53 degrees, a difference of dozens of degrees. This shows that the designed plastic cover basically does not have the function of heat conduction and heat dissipation. However, the function of heat conduction and heat dissipation is considered in the design of general lamps. Therefore, in conclusion, the design of working electrical parameters of LED lamp beads should be based on the actual situation. If the heat conduction and heat dissipation function of the lamp is very good, it doesn't matter to increase the driving current of LED white lamp, because the heat generated by the work of LED lamp beads can be exported to the outside in an instant, and there is no damage to the LED, which is the best care for the LED. On the contrary, if the heat conduction and heat dissipation function of lamps is careless, it is best to design the circuit smaller to let it release less heat.

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