Does a MBP use less electricity with the screen brightness down?

Discussion in 'MacBook Pro' started by machspeed5, Sep 29, 2009.

  1. machspeed5 macrumors member

    Joined:
    Feb 11, 2008
    #1
    (Electricity as in AC power.) I've been using the brightness controls (F keys) to turn off the screen at night and leave my computer running. I just assumed it uses less AC power that way and I'm saving some electricity but I don't know a lot about electricals to confirm my theory. Does anyone know?
     
  2. thegoldenmackid macrumors 604

    thegoldenmackid

    Joined:
    Dec 29, 2006
    Location:
    dallas, texas
    #2
    When the screen is turned down the computer is using less electricity. It's common math, when the screen is dimmed, there it's not as if the computer uses the left over power to make a black image.
     
  3. mattais macrumors member

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    Apr 29, 2008
    Location:
    Bristol, UK
    #4
    in anything electrical if you turn something off or down then it uses less power
     
  4. phoobo macrumors regular

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    Sep 13, 2008
  5. Macshroomer macrumors 65816

    Macshroomer

    Joined:
    Dec 6, 2009
    #6
    What I am wondering is if when the screen is inverted ( Control + Option + Command + 8 ) does it help to save energy since the white windows that would be open are now black.

    I love this feature in terms of prying eyes on flights, really messes with people.
     
  6. cluthz macrumors 68040

    cluthz

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    Jun 15, 2004
    Location:
    Norway
    #7
    It's the backlight that uses the majority of a LCDs power, dark colors doesn't use less power then bright ones on a LCD
     
  7. dennis123123 macrumors member

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    Aug 30, 2009
    #8
  8. ayeying macrumors 601

    ayeying

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    Dec 5, 2007
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    Yay Area, CA
  9. cluthz macrumors 68040

    cluthz

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    Jun 15, 2004
    Location:
    Norway
    #10
  10. snaky69 macrumors 603

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    Mar 14, 2008
    #11
    If you're truly worried about electricity consumption of your computer while you're sleeping, why not simply put it to sleep by shutting the lid or shutting it down.

    You won't lose any of your work or currently open applications if you put it to sleep, and the only thing that'll be using electricity is your RAM, which barely requires 5W.
     
  11. J&JPolangin macrumors 68030

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    Jul 5, 2008
    Location:
    Thule GL @ the TOW
    #12
    ...slightly, turn it off if you want to save the most energy...
     

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