Indian Technology how to make a perfect led flash

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Hello friends in this video I make a good quality flashing lights which you can make easily by watching this video in this video I simply show how to make a led bulb by using old materials

make this led flash bulb I use this product in below:

1.3 watt led
2.old mobile battery 3.7 volt
3.switch
4.some kinds connecting wires
5.some simple ideas