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KennethT

KennethT

1 hour ago, dcarch said:

 

All LEDs require a minimum voltage to fire. Therefore no LEDs can be dimmed like incandescent bulbs.

That said, COB LEDs can be dimmed to some degree. down to 30%? Not sure.

 

dcarch

Not necessarily. It depends on the driver. I can dim my Fluence light down to 10% or maybe lower (I haven't tried less than 10%).

 

ETA: LEDs brightness is actually dependent on the current flowing through it, not the voltage across it.  The voltage drop across the LED is pretty constant (and you're right, there is a minimum voltage below which it won't turn on), but the driver varies the brightness by shoving different amounts of current through it, not varying the voltage across it.

KennethT

KennethT

57 minutes ago, dcarch said:

 

All LEDs require a minimum voltage to fire. Therefore no LEDs can be dimmed like incandescent bulbs.

That said, COB LEDs can be dimmed to some degree. down to 30%? Not sure.

 

dcarch

Not necessarily. It depends on the driver. I can dim my Fluence light down to 10%.

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