1, from the comparison of cost performance, it should be that the price of 40W strobe-free power supply introduced by Zhuhai Saimingyuan, Zhuhai Hong Ke and Foshan Igor, such as Zhuhai Saimingyuan 20 15, is around 25 yuan, and the price of jewelry lamps 12*3W waterproof power supply is around 2 1 yuan. The brand is ok and the price is moderate.

2. Quality comparison: Wei Ming, Infineon, Delta, Great Wall, etc. These good quality prices are also high. You can compare the quality and price through Baidu. I hope it will help you.