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Caused by bad contact:
1.Screw all the lamp heads tightly.
2.Check to see if the connection between the wire and the lamphead wire is loose.
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It doesn't matter how many lampheads there are, if the wattage is large enough, one is enough, and if the wattage is small, there are a few.
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It may be that the line is not good, the lamp line is small, and the voltage cannot keep up. Sometimes I come to my shop and look at "Lifen Crystal Lamp".
This should be caused by poor contact somewhere, most likely it is a problem with the switch, find an electrician to help you see, if it is a problem with the switch, change it.
The ceiling crystal lamp in the living room of the villa generally chooses 30 heads, and the power depends on the specific bulb you choose. It is recommended that you choose LED lights, if you choose 5 watts, then the power is 150 watts, which is equivalent to 450 watts of brightness.
There are three clips on the top of the lampshade, gently open the clips, the cover can be removed, and the cover can be removed to replace the bulb.
It should be that the yellow row of lamp beads is broken, and you can see if there is a little black in the yellow lamp beads, and if there is, the yellow lamp beads are broken.
There is a problem with the ballast of the lamp, and now there is basically no problem with the low supply voltage.