[General] why a stage equipment need ballast and power supply

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my led light only need "led drive"? like ballast, why stage equipment need a ballast module?

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why need power supply? because Hoists & Motor & Fans need power supply  the can't use 110v or 220v AC,  Need to lower the voltage to use, otherwise it will burn the circuit

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Quote @cougeek replied at Oct 13,2022 12:39
why need power supply? because Hoists & Motor & Fans need power supply  the can't use 110v or 22 ...

my fault   .
it has many electronic components, easily damaged

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the machine,machine, electric drive, like your computer's power

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