The light-emitting diode dimmed

• ‌ driver damaged ‌ : The LED lamp bead needs to work under DC low voltage (usually within 20V), while the voltage in our daily life is AC high voltage (usually 220V AC). Therefore, a device (the "LED constant current drive power supply") is required to convert the mains power into the DC voltage required for the LED lamp bead. If any of the devices inside the driver (such as capacitors, rectifiers, etc.) fail, it may cause a change in the output voltage, resulting in unstable work of the LED lamp bead, and then dim the light. Driver damage is a common fault in LED luminaires, and the problem can usually be resolved after replacing the driver ‌.
• ‌LED chip quality problem ‌ : if the LED chip is not good, the brightness attenuation will be faster, resulting in the LED lamp darker and darker. In addition, there are defects in the production process, such as poor heat dissipation of the LED chip, which will also lead to high chip temperature and aggravate the attenuation process ‌.
• ‌ light decay ‌ : The light attenuation of LED lighting products refers to the weakening of the signal of light in transmission. The degree of light attenuation of LED products produced by different factories may be different. Light decay is a normal phenomenon of LED lights gradually darkening during use, which is related to the quality of LED chips, production process and use conditions ‌.
• ‌ packaging problem ‌ : in some cases, the packaging adhesive of LED lamp beads may be eroded by chemicals, resulting in colloid discoloration, which affects the luminous effect of LED. For example, if the packaging glue evaporates sulfur-containing gases during the curing process, these gases may invade the LED packaging glue, and the packaging glue will undergo vulcanization cross-linking reaction, resulting in yellow and dark ‌.

How to prevent LED dimming

1.Choose from high quality LED products and drivers ‌ :

• The selection of reliable quality LED beads and drivers, to ensure that the LED chip body is good, the production process without defects, in order to reduce the occurrence of brightness attenuation and light decay ‌.
• The driver should match the parameters of the LED lamp bead to ensure stable power supply and avoid dimming of the lamp due to changes in output voltage ‌.

2.Pay attention to the environment ‌ :

• Try to avoid exposing LED lamp beads to a humid environment for a long time to prevent oxidation from affecting the luminous effect or burning the lamp beads ‌.
• For outdoor use of LED lamps, you should choose products with higher waterproof grade or install waterproof protective cover at the time of installation ‌.

‌3. Strengthen heat dissipation management ‌ :

• The heat dissipation performance of LED lamp beads is crucial to its service life and brightness stability. Therefore, we should ensure that the heat dissipation system of the LED lamp bead is good, and avoid the attenuation of the chip temperature is too high ‌.
• You can choose LED lamp beads and substrate with excellent heat dissipation performance, and reasonably design the heat dissipation structure of the lamp.

‌4. Regular inspection and maintenance ‌ :

• Regularly check the working status of LED lamps, such as finding that the lamp beads dim or uneven light, should be replaced or repaired in time ‌.
• For vulnerable parts such as drivers, their working status should also be checked regularly to ensure that the circuit is well connected and there is no short circuit or open circuit.

‌5. Avoid chemicals ‌ :

• During the packaging and use of LED lamp beads, contact with chemicals such as sulfur should be avoided to prevent the vulcanization cross-linking reaction of the packaging adhesive resulting in discoloration and darkening ‌.