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  1. #1
    Join Date
    Jun 2004
    Location
    Friday Harbor, San Juan Island, Washington
    Posts
    13,029

    Default Dimming LED bulbs

    I don't know enough about this yet... one of you does. I need to spec some dimmers for LED bulbs, and I need to spec the bulbs themselves. Looking through the Lutron site I see they are selling a line of "HED" dimmers tested for use with various LED (and CFL) bulbs. They're not that expensive, but I don't know if they'll work better, and if the bulbs they're tested with are even the ones I want--some of which are going in typical surface fixtures and would normally be 75-watt incandescents, and others for downlights and would normally be 75-100 watt floods. I know at least a couple of you guys are fairly fluent with this stuff.... can ya' break it down?

    http://www.lutron.com/EDUCATION-TRAI...dLEDs.aspx#hed
    Bailer Hill Construction, Inc. - Friday Harbor, WA
    Website - Facebook

  2. #2
    Join Date
    Feb 2008
    Location
    Northwest Indiana
    Posts
    5,576

    Default Re: Dimming LED bulbs

    The new Lutron dimmers definitely help on the LED's for dropout. I waited to add dimmers to a job until these came to market. I did install dimmable LED's, it was worth they wait. I ended up with the Diva 3 way. I hope they release them in the Mastero series.

    I used the bulbs of my choice. They are PAR16-8W LED. 5200k IIRC. Just checked, they are PAR20-6W from EarthLED.

    I did have to play with the dial to set the low dim level. Took about 10 seconds.


    Tom
    Last edited by tjbnwi; 04-24-2012 at 09:08 PM.
    http://chicagocraftsmen.org/2011/06/261.html

    Check with the AHJ, what we say doesn't matter.

  3. #3
    Join Date
    Jun 2004
    Location
    Friday Harbor, San Juan Island, Washington
    Posts
    13,029

    Default Re: Dimming LED bulbs

    Tom, thanks, that is very helpful. Any chance you can recommend some specific bulbs? Long life, high efficacy, warm color... I'm sure they're gonna cost.
    Bailer Hill Construction, Inc. - Friday Harbor, WA
    Website - Facebook

  4. #4
    Join Date
    Dec 2005
    Location
    Michigan
    Posts
    7,455

    Default Re: Dimming LED bulbs

    Here is the short story on theory.
    LEDs operate at constant voltage. For example red is somewhere around 1.7-2.0V. You vary light intensity by varying (limiting) current, so a proper dimmer is essentially a variable current source tailored for the current requirements of that particular string.

    Not a very universal thing so you need to talk to both vendors and see about compatibility. Or buy everything from one vendor if you can.

  5. #5
    Join Date
    Feb 2008
    Location
    Northwest Indiana
    Posts
    5,576

    Default Re: Dimming LED bulbs

    Quote Originally Posted by David Meiland View Post
    Tom, thanks, that is very helpful. Any chance you can recommend some specific bulbs? Long life, high efficacy, warm color... I'm sure they're gonna cost.
    http://www.earthled.com/lumiselect-d...ght-bulbs.html

    Most are CREE LED's.

    Tom
    http://chicagocraftsmen.org/2011/06/261.html

    Check with the AHJ, what we say doesn't matter.

  6. #6
    Join Date
    Jan 2005
    Posts
    9,252

    Default Re: Dimming LED bulbs

    Phillips LED dimmable are good as well for the 6" cans. I have a ton in and going in to my house...
    “Racism is man's gravest threat to man - the maximum of hatred for a minimum of reason.”
    Abraham J. Heschel (Jewish theologian and philosopher, 1907-1972)

  7. #7
    Join Date
    Aug 2005
    Location
    Yorba Linda, CA
    Posts
    414

    Default Re: Dimming LED bulbs

    Lutron tech support has been pretty impressive when I've called in the past:

    (800) 523-9466
    Steve

  8. #8
    Join Date
    May 2009
    Location
    Kent UK
    Posts
    3,152

    Default Re: Dimming LED bulbs

    To my VERY limited knowledge............ it is possible to dim LED lighting at 240 volts (No doubt it also works at 110 volts)

    Ive seen it done, but you need to talk to an expert "sparks"
    Limey Carpenter

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