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Problem with dimmer on low-power LED Lights. - add dummy load resistor to fix?

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  • Problem with dimmer on low-power LED Lights. - add dummy load resistor to fix?

    Issue:
    Circuit with FOUR (4) Ceiling 5w LED Lights (all new, same brand) will not light up.
    BUT... Circuit with SIX (6) of the same all new lights, works fine.

    Tried 2 different Insteon Dimmers (77D & 76D) on both circuits, same results. Dimmer powers up, communicates with my HA system just fine and shows the dim status on front as expected

    Called Insteon Support, they had no clue.

    Maybe the minimum draw is not being met?
    Would adding a dummy load resistor fix the issue?

    thx for your help!

  • #2
    If the dimmers is on full power there is not minimum draw of current.

    One way to test is to replace one of the LED with an incandescent.

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    • #3
      Originally posted by drhtmal View Post
      If the dimmers is on full power there is not minimum draw of current.

      One way to test is to replace one of the LED with an incandescent.
      I assume that is the case since 6 lights works but 4 lights doesnt. They are 5w lights.

      Anyone know what dummy load would be best suited?

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      • #4
        Originally posted by Ltek View Post

        I assume that is the case since 6 lights works but 4 lights doesnt. They are 5w lights.

        Anyone know what dummy load would be best suited?
        Have you tried the incandescent to verify that is the problem?

        There was a recent post about using a resistor to fix a similar issue. I think Lutron has such a device but there are probably other manufactures as well.

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        • #5
          Aeotec and Fibaro both sell dummy loads called 'bypass' on Amazon that you connect in parallel to your load to allow a small current to flow so that the TRIAC in the switch/dimmer can properly function.

          This is usually for very small loads such as under 4W LED bulbs, but depends on a lot of conditions.

          The bypass component is usually LRC based, as in resistor with coil and small capacitor.

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