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How to extend the lifespan of LED lighting fixtures
Dec 14,2018
LED lights are different from incandescent and fluorescent lights; their brightness is not as long-lasting as that of incandescent and fluorescent lights, and LED lights are prone to light decay. Why does light decay occur in LED lights? This is related to many factors, such as the quality and brightness of the LED light's chip. So, how can we extend the lifespan of LED lights?
To ensure heat dissipation, good aluminum materials must be used for light fixtures. Currently, there are many plastic and glass LED tubes on the market that have serious heat dissipation issues, leading to a short lifespan, which is counterproductive. There are defects in the manufacturing process, and the heat from the LED chip cannot be effectively dissipated from the PIN legs, causing the temperature of the LED chip to rise excessively, which accelerates chip degradation. Issues with usage conditions also arise; LEDs are driven by constant current, but some LED lights use voltage driving, which causes rapid degradation. The driving current exceeds the rated driving conditions. In fact, there are many reasons for light decay in LED products, but the most critical issue is still heat dissipation. The better the heat dissipation performance, the lower the operating temperature of the LED, the smaller the light decay, and the longer the LED lifespan.
In fact, light decay in fixtures is an inevitable process of their operation. When selecting fixtures, we should try to choose those with good quality and heat dissipation performance. During use, we should also try to reduce the workload of the fixtures to slow down the rate of light decay and extend the lifespan of the fixtures. Whether to deal with light decay depends on the specific situation; first, we need to look at the illumination requirements. For an office area, the required illumination level may really need to be 300lx; if it does not meet the standard, it can lead to fatigue and other discomforts. Therefore, in places where illumination is required, such as offices, museums, and gyms, strict illumination standards must be met. Moreover, since LED light sources have a relatively long lifespan, we need to consider that we still need to meet that standard after two years, so we must leave some margin in the initial design.
But for a hotel, is there really a difference between 300lx and 200lx? Actually, there is not much difference because at that point, the illumination level is no longer important. What matters more is whether the distribution of illumination meets the purpose of creating atmosphere and scene transitions, as well as glare control. In hotel applications, we focus more on the feeling of people entering the space and the overall lighting environment. The specific illumination level is not that significant because human visual perception is quite flexible.
In some special occasions, such as the illumination of a salon venue, the brightest area exceeds 1000lx, while the darkest area is 10lx, which can still feel quite comfortable. Moreover, this contrast between light and dark creates a nice atmosphere, which is the effect that hotels need. Therefore, for hotels, illumination is not that important, meaning that a certain range of light decay is not that critical. It depends on the usage scenario and requirements. If it is for decorative effects, only colorful lights are needed, such as red, green, and blue LED tubes, and there is no need to consider light decay issues, focusing solely on color effects. At this point, only two issues need to be considered. The first is safety and reliability; we should try to improve reliability to avoid failures that could affect the overall decorative effect. The second is waterproofing; if used outdoors, the waterproof rating should at least reach between IP65 and IP68; otherwise, it should not be placed outdoors. If water leaks in, the direct result is damage, and if not handled properly, it can easily lead to electric leakage. At this point, safety and reliability become our main considerations.
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