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Thread: LED vanity fixture buzzing when dimmed by Lutron Diva CL

  1. #1
    Junior Member
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    Jun 2019
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    LED vanity fixture buzzing when dimmed by Lutron Diva CL

    I have this bathroom vanity LED light (no LED bulbs, it has built in LEDs connected to a LED Driver):

    Home Decorators Collection 24-inch Brushed Nickel Integrated LED Vanity Light - ENERGY STARĀ®
    Model # IQP1381L-3

    Links: homedepot.ca homedepot.com

    It has this LED driver in it:

    LED DRIVER
    (TRIAC DIMMING)
    MODEL: A80Z224
    INPUT:120VAC / 60Hz 240mA MAX
    OUTPUT: 33-53V / 420mA
    POWER FACTOR:>0.9

    Click image for larger version. 

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    I notice the output is not the usual 12-24v for LEDs, but 33-53. I don't know if that is relevant.

    It is a very bright light so I added the Lutron Diva CL dimmer: DVCL-153PR-WH-C
    It dims, but the fixture now has a buzzing sound (whenever it is on, low or high).
    Was it the right dimmer? I've read that the Lutron CL is a TRIAC dimmer with "High efficiency dimming".

    What can be done to stop the buzzing?

    Would the Lutron ELV Dimmer DVELV-300P-WH fix the buzzing? (It is 3x the price of the CL) or is some other type of dimmer needed?

  2. #2
    Senior Member
    Join Date
    Oct 2013
    Posts
    1,162
    Google has never heard of that model number so...

    I would try a standard incandescent dimmer first (DV-600 or DV-603).

    I would then try the reverse phase dimmer (DVRP-253). RP and ELV are similar but the RP is a newer design.
    LED, Incorporated
    Raleigh, NC 27614

  3. #3
    Junior Member
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    Quote Originally Posted by randyc View Post
    Google has never heard of that model number so...

    I would try a standard incandescent dimmer first (DV-600 or DV-603).

    I would then try the reverse phase dimmer (DVRP-253). RP and ELV are similar but the RP is a newer design.
    I would like to avoid buying and returning more and more dimmers.

    Is there any technical reason the DV-600 would not cause buzzing when the DVCL-153PR did? Aren't they both "leading edge" triac dimmers?

    What is the main difference between the DVRP-253 and DVELV-300P? Are they both "trailing edge" dimmers that would work with a LED driver which claims "Triac dimming" on it? The ELV-300 is $20 more and I'd like to understand why that is. (one amazon review said the DVRP "felt cheap" when pushing the switch, was it just made cheaper? )

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