Two weeks ago, the desk lamp "ç °" did not light up. I thought it was a bad contact with the desk lamp. I took the LED and found that something was shaking inside. It is estimated that the components inside the LED were broken. So dismantled, read the transaction record, the transaction snapshot page is produced by Zhongshan Fangwei, then bought two 5W (2 yuan) a 9W (3 yuan) package.
After disassembling, shake it a few times and drop a capacitor housing from under the board. There are also a number of kraft paper scraps.
LED light board. It is easy to see that the LED is bridge rectified and has no driver IC.
On the back of the light board, two capacitors, black paper capacitors have exploded, and the sound of the blast that my wife heard is the explosion of the capacitor. You can see a lot of kraft paper scraps.
Take a closer shot.
in conclusion
This LED bulb is loaded from sacrifice to less than 4 months, calculated as 3 hours a day, which is more than 300 hours of life. This kind of quality control and component life is far less than an ordinary incandescent lamp.
Therefore, LED purchases also need to be carefully and selected.
Air Pressure Type Heat Shrink Tubing For Fibre Optic Connector Box
Air pressure type heat shrink tubing for fibre optic connector box
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