The harm of LED high bay light heat radiation is not timely
As everyone knows, LED high bay light added in the working condition of power are not all into light, but a part of the power transformation into heat. LED high bay light is very sensitive to temperature, the increase of junction temperature will influence the LED high bay light life, light efficiency, light color (wavelength), color temperature, light (light) and the reliability.
First of all, the temperature is too high will cause permanent damage to the LED high bay light.
When the temperature exceeds the temperature load LED chip, the luminous efficiency of LED high bay light will be rapidly decreases, it produces obvious light decay and causes damage.
In addition, LED with transparent epoxy resin package, if the junction temperature exceeds the solid phase transition temperature (usually 125 degrees), packaging material to shape change and thermal expansion coefficient of rubber swells, resulting in LED high bay light circuit failure.
Secondly, the high temperature will shorten life .
LED high bay light lifespan is reflected in its light decay, which is the length of time, and the brightness becomes lower and lower until the end is extinguished.
It is usually defined that the flux attenuation of LED high bay light is 30%. LED high bay light chip material defects in high temperature rapid proliferation, reproduction, until the invasion of light emitting area, forming a lot of the radiative recombination centers, reduce the LED high bay light luminous efficiency.
In addition, under the condition of high temperature, micro defects within the material and the fast expansion of impurity from the interface and panels will also introduce the light emitting area, to form the deep level, will also accelerate the LED high bay light device failure.
At the same time, transparent epoxy resin is modified at high temperature, yellowing, affect the pervious to light performance, working temperature, the higher the faster the process will be carried out, this is another reason causes LED high bay light failure. luminescence of phosphors is also a major factor affecting the decline of high bay light, because the attenuation of phosphor powder in high temperature is very serious.
The heat dissipation problem is the main obstacle to the development of LED high bay light for lighting objects. Therefore, the temperature of LED high bay light is reduced by various means.Because the heat dissipation of LED high bay light is becoming more and more attention, all kinds of heat dissipation technologies are also applied to LED lamp lighting technology.
First of all, the temperature is too high will cause permanent damage to the LED high bay light.
When the temperature exceeds the temperature load LED chip, the luminous efficiency of LED high bay light will be rapidly decreases, it produces obvious light decay and causes damage.
In addition, LED with transparent epoxy resin package, if the junction temperature exceeds the solid phase transition temperature (usually 125 degrees), packaging material to shape change and thermal expansion coefficient of rubber swells, resulting in LED high bay light circuit failure.
Secondly, the high temperature will shorten life .
LED high bay light lifespan is reflected in its light decay, which is the length of time, and the brightness becomes lower and lower until the end is extinguished.
It is usually defined that the flux attenuation of LED high bay light is 30%. LED high bay light chip material defects in high temperature rapid proliferation, reproduction, until the invasion of light emitting area, forming a lot of the radiative recombination centers, reduce the LED high bay light luminous efficiency.
In addition, under the condition of high temperature, micro defects within the material and the fast expansion of impurity from the interface and panels will also introduce the light emitting area, to form the deep level, will also accelerate the LED high bay light device failure.
At the same time, transparent epoxy resin is modified at high temperature, yellowing, affect the pervious to light performance, working temperature, the higher the faster the process will be carried out, this is another reason causes LED high bay light failure. luminescence of phosphors is also a major factor affecting the decline of high bay light, because the attenuation of phosphor powder in high temperature is very serious.
The heat dissipation problem is the main obstacle to the development of LED high bay light for lighting objects. Therefore, the temperature of LED high bay light is reduced by various means.Because the heat dissipation of LED high bay light is becoming more and more attention, all kinds of heat dissipation technologies are also applied to LED lamp lighting technology.
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