Đèn LED với đầu nối hình trụ

You need a female barrel connector and about 10cm of led strip. Connect led strip to barrel connector with soldering and tuck in the led strips and barrel connector in(You might need to warm up the tip of the diffuser  with a lighter depending on the diameter of your barrel connector. Mine is 11mm and I need to use a lighter).

No need to add supports. It might be good to add some brim.

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I made this design for the bank lamp which linked because I couldn't find the “tbulb b”.

https://www.printables.com/model/270695-bank-lamp/comments/665956