1.Heat dissipation
The poor heat resistance of LEDs could cause problems in the life span of the wick.
Light perception
One of the disadvantages of LED light is the pure spectrum of light, but this is a important disadvantage when it comes to vision. The human eye is unable to concentrate on a single spectrum of light for very long duration, and LEDs aren’t well-suited to rendering colors.
3.Light decay
The light absorption of LEDs is a major issue. Most of the existing LED household lighting is confined in size and is hard to do a good job in protection. This is particularly problematic in areas that have big voltage switches and large interference.
How long do LED lights last?
There’s a good chance that the quality of the light bulb you have isn’t adequate when it starts to dim after only one year.
The light will appear after 1000 hours of usage, even if it is being used 8 hours per day. There is no doubt that changing is unavoidable.
The lifespan of LEDs is a long time.
First, let’s talk about the main reasons this should not be happening. The life expectancy of LEDs typically exceeds 30,000 hrs. The lifespan refers to its capacity to function as normal and not the brightness.
Higher quality LEDs canguarantee an 80% brightness following steady operation for up to 5-8 years. The average annual brightness decrease is 3% or less that is hard to distinguish with the naked eye.
After a time of 1000 hours, the lamp’s brightness was clearly reduced. This is a sign that it is a major issue.
Another drawback to LED lighting is there may be problems in the circuit or with poor heat dissipation from the light source, which results in serious light attenuation:
Why is the brightness decreasing?
The cause is light attenuation. of the dimming.
Light attenuation is the gradual decrease in LED’s luminescence over time.
The dissipation of heat from lamps is directly related to the attenuation of light. The greater the amount of heat lost, the greater the light attenuation.
Therefore, the service life is dependent on the length of time that, after working, the brightness will still be maintained to around 80percent of factory brightness. In 3-5 years, if the lamps aren’t made properly, there will be obvious changes.
How can you tell if the brightness is right
With reference to national standards in writing and learning There are guidelines for illumination of the desktop:
It is best to stay between 800-1500Lux and the minimum cannot be less than 500Lux;
You can utilize your mobile phone to do simple tests to find out whether the lighting on your computer meets the guidelines:
Use the CPU-Z app to adjust the column to the Sensors. The light column is the measurement made by the front lighting sensor. This value can be used to determine the size. The error should not be too big:
The most common source of light used in LED lighting is LED. The lifespan of an LED should be 100,000 hours.
However, due to factors like the packaging materials as well as the environment in which they are used, the driving power supply and so on. The lifespan of LED light sources that have a certain quality is usually around 30,000 hours. But excellent ones can exceed 50 000 hours.
However, even if it’s not caused by other elements, LED itself also has light decay. Usually when the luminous flux drops to 80% of the initial luminous flux, it is thought that the life span of the LED light source has run out.
We can see that it’s common that LED lamps dim over time due to their light source. But, it can take quite a long time.
Environments that work, such as extreme humidity and temperatures can have an impact on the lifespan of the light source, including things like the design of the optical lamp.
Another aspect that influences the life of LED lamps is the power supply for the LED’s driving supply.
Disadvantages of LED lights is that the power source driving the light may be faulty, but the light source remains excellent. This is because the components of the power supply can last for years particularly the capacitors within.
Good The price gap between capacitors and ordinary capacitors is substantial and the longevity of the capacitor directly determines the lifespan of the driving power supply.
LEDs require a power supply to provide the required current. The power supply that drives the LED could be broken which causes the light to flicker or not illuminate.
Above is a chart of tests on the lifespan of LEDs conducted by CREE. This chart displays the numbers of relative luminous flux and hours of operation measured by experimentation.
However, various factors could be significant in affecting the length of time. The test instructions from CREE only mention these factors but do not offer different charts for the various elements.
For example, temperature. the default junction temperature of various LED parameters is 25 degrees. Above this temperature, the lifespan is reduced.
The light will dim to 95% within 6,000 hours and up to 85% by 23,200 hours.
CREE products are among the best around the globe. Other products at this level usually don’t surpass them.
This CREE chart is significant for reference but it’s based on lab conditions at all times and the use of it is typically less than those data.
For instance: if the light is reduced to 95 percent at 6000 hours but it could then decrease to 85% or lower after 6000 hours. The most important reason is heating.
What are the possibilities to achieve such high-quality conditions that guarantee the LED junction temperatures are not higher than 25 degrees Celsius?
The benefits of LEDs are overstated.
Even with top-end LEDs like CREE’s efficacy is only 20%. The remaining 80percent+ is used to produce heat. What is the temperature from this point of view?
In fact, what most people are worried about is not the light failure, but instead the light not lighting up, just like the user who uploaded a photo of the OP E27 lamp mouthLED. It is also a matter of the circuit that drives it.
The majority of LEDs are placed in ceilings with the lamp head facing downwards, which is unfavorable for the circuit that drives LEDs.
It is because at least 80percent of the problem is due to the design of the circuitry driving the LED light bulbs.
As you can see from the cabling in that photo The driver is most likely the one that’s broken and not the LED tube. The driver circuit wears out more quickly if the integrated LED is being used to light the space.
