Light Dimmer ?????

Discussion in 'Electrical Forum discussion & Blog' started by edlentz, Aug 18, 2008.

  1. edlentz

    edlentz New Member

    Messages:
    70
    Location:
    Michigan
    I just installed a new 3 way dimmer and it works great. The question is: if the lights are at 50% do I use 50% less energy? My wattage is at full power 450 watts. Given that the dimmer gets warm (just) does that mean that the power used is the same?

    Just wondering
  2. Chris75

    Chris75 Electrician

    Messages:
    608
    Location:
    Litchfield, CT
    Lights Dimmed...Saves Electricity.....Makes incandescent bulbs last longer
    10%..................10%........................2 times longer
    25%..................20%........................4 times longer
    50%..................40%........................20 times longer
    75%..................60%........................> 20 times longer
    Last edited: Aug 18, 2008
  3. jadnashua

    jadnashua Retired Defense Industry Engineer xxx

    Messages:
    21,824
    Location:
    New England
    With most modern dimmers, the act of reducing the voltage to the lights isn't perfect, but as shown in the previous post, it's fairly linear...you do lose some in the process you'll notice as heat.
  4. edlentz

    edlentz New Member

    Messages:
    70
    Location:
    Michigan
    I am glad to see that table. I wasn't sure if the heat was the rest of the power disipated. Thanks alot for the replies
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