First of all, you can turn on the LED ceiling light, observe the light source, if the light source part is not all lit, it is due to some LED lamp beads broken, causing the light to dim, need to replace the broken lamp beads. If the lamp beads are all lit and the light is dimmed, then there are several possibilities, one is the failure of the power supply, the output voltage of the power supply becomes low, resulting in the dimming of the light and the need to replace the power supply.
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The second is the poor heat dissipation of the LED lamp or the working voltage of the lamp bead is too high, and the current is too large, which causes the rapid light aging of the lamp bead, which is a design defect.
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Third, the quality of the light source itself is not good, the light decay is serious, and the brightness will be reduced in a short time, some LED lamp manufacturers in order to reduce costs, the use of domestic LED chips, it is easy to have this problem.