Some friends have asked why their LED lights suddenly became very dim, so I've taken the time to explain the reasons behind sudden dimming and what you can do about it.
Generally speaking, LEDs do experience some light degradation over time. If used for a long period, they may appear dimmer than when they were new. But this is usually gradual and not sudden. The rate of light decay depends on the quality of the LED and how it's used.
It's normal for LEDs to lose about 5% of their brightness within the first year and up to 15% after three years. So even after 10 years, they might still work, but their light output will be significantly lower. If you're wondering what causes LED light decay and how fast it happens, keep reading.
Why do LED lights suddenly become very dark? This is often due to poor-quality components or improper design. Here are some common reasons:
- The LED chip used is of low quality, causing faster brightness loss.
- Some LEDs are driven by voltage instead of constant current, which can lead to instability and quicker dimming.
- The drive current exceeds the rated specifications, causing the LED to overheat and degrade more quickly.
Beyond these factors, heat management is one of the most important aspects affecting LED longevity. Many cheaper products don't include proper heat dissipation solutions. Over time, this can accelerate light decay and reduce overall performance.
While some degree of dimming is natural over time, sudden and dramatic changes in brightness are usually signs of a problem. To avoid this, always choose high-quality LED products with good thermal management and proper power supply systems.
If your LED lights are dimming faster than expected, it might be worth checking the driver, the quality of the chips, and whether the installation allows for adequate cooling. Investing in better quality now can save you from frequent replacements later.
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