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bad idea or terrible idea? bathroom fan led on a dimmer
Posted by: mattkime
Date: January 22, 2020 11:39PM
I have a bathroom fan with a built in led light. It does not say that its dimmable. I'm tempted to try putting it on an led compatible dimmer switch anyway. The light and fan are on different circuits. Am I likely to damage the led light?

(I personally don't understand why alllll leds aren't dimmable. technology blah blah blah....)



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Re: bad idea or terrible idea? bathroom fan led on a dimmer
Posted by: Carm
Date: January 23, 2020 01:38AM
Bad Idea.
For your reading pleasure. [integral-led.com]
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Re: bad idea or terrible idea? bathroom fan led on a dimmer
Posted by: pdq
Date: January 23, 2020 09:48AM
Meh. Might kinda work. Might also buzz, and/or not work very well.

It wouldn’t be dangerous, but worst case scenario is you end up with a fan+light integrated fixture with a dead light and you’d have to replace the whole thing.

But that seems unlikely...kinda.
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Re: bad idea or terrible idea? bathroom fan led on a dimmer
Posted by: mattkime
Date: January 23, 2020 10:23AM
Is there more complexity to dimming a led than I expect? Or is it about cost cutting?



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Re: bad idea or terrible idea? bathroom fan led on a dimmer
Posted by: JoeH
Date: January 23, 2020 10:33AM
Quote
mattkime
Is there more complexity to dimming a led than I expect? Or is it about cost cutting?

Yes, and yes.

A dimmer is basically just providing a reduced AC voltage to the light. The LED itself runs on low voltage DC provided by the electronics that are either part of the fixture or the bulb itself. Those electronics have to be designed to respond to reduced AC voltage input and put out a lower voltage DC to the LED. Simple, low cost electronics don't do that. This is the simple explanation, the details get more complicated
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Re: bad idea or terrible idea? bathroom fan led on a dimmer
Posted by: NewtonMP2100
Date: January 23, 2020 11:09AM
....don't forget to add bidet......



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I reject your reality and substitute my own!
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Re: bad idea or terrible idea? bathroom fan led on a dimmer
Posted by: Carm
Date: January 23, 2020 11:46AM
Quote
JoeH
Quote
mattkime
Is there more complexity to dimming a led than I expect? Or is it about cost cutting?

Yes, and yes.

A dimmer is basically just providing a reduced AC voltage to the light. The LED itself runs on low voltage DC provided by the electronics that are either part of the fixture or the bulb itself. Those electronics have to be designed to respond to reduced AC voltage input and put out a lower voltage DC to the LED. Simple, low cost electronics don't do that. This is the simple explanation, the details get more complicated

That was a good simple explanation.
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