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How will I know whether to use a Constant Voltage or Constant Current driver with my LEDs?

Dec. 17, 2019

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How will I know whether to use a Constant Voltage or Constant Current driver with my LEDs?


Usually the manufacturer of the LED module will specify whether it is for use with either a Constant Voltage or Constant Current driver. 

You cannot run an LED module designed for CC from a CV supply without damaging it. 

However a CV LED load will run (albeit inefficiently) from a CC driver. 

Another indication is if the LED module is rated in milliamps (mA) or volts (V). Milliamps indicates a CC driver and Volts means a CV driver is required.


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