Saving Energy – One Monitor at a Time


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[Please note: I have mirrored same post at http://kedarsoman.wordpress.com/2006/11/21/saving-energy-one-monitor-at-a-time/

If you would like to leave a comment, please leave it there. I appreciate it, thanks.]

Several times I had observed that my laptop battery lasts a lot longer if I turn down the brightness of the screen. That just seems such a common sense thing to do. But I never took power consumption of monitor that seriously till one day I almost burned my hands while trying to move the big bulky 19 inch CRT monitor. The back side of the monitor was really hot.

Boy, how much power does this one consume? A quick look at the manual and turns out that my old big bulky 19” monitor was consuming a whopping 120 Watts. It’s like having a big bright bulb burning right in your face. That figure was big enough for me to switch off my monitor while not working. But still I wondered, what is the exact relation between what is being showed on screen and how much power is being consumed by the monitor.

A really good EBay deal on P4400 KillAWatt by P3 International convinced me that God wants me to buy a power meter and investigate this in detail. For anyone interested in “watching your power”, this is a handy thing for about $30.

I ventured onto this study. I checked monitor power consumption for CRT (Cathode Ray Tube aka big, bulky, heavy, TV shaped, ugly, dinosaurs), as well as LCD monitors (Liquid Crystal Display aka thin , flat, light, cool cuties) . Since 17” monitors are the most common, I chose Compaq S710 in my office (which is CRT 17”) and Hundai Imagequest L70N, which is LCD 17” monitor for study and comparison.

I checked following things

* CRT monitor consumption vis-à-vis LCD monitor consumption
* Brightness settings varied 0, 50, 100
* Contrast settings varied 0, 50,100
* Screen background changed black, gray, white
* Soft power off (off using power settings of computer) and hard power off (off using switch) consumptions.

The results were really surprising. Following charts summarize my readings.

CRT Monitor @ Contrast 50, Brightness Vs PowerCRT Monitor @ Contrast 100, Brightness Vs Power

CRT Monitor @ Contrast 100, Screen Color Vs PowerCRT Monitor@ Desktop Color = White,Contrast Vs Power for varying brightness

LCD Monitor, Brightness Vs Power

The Summary of the findings is below

*Sensitivity to various settings is as follows

Power Consumption Parameter

CRT Monitor

LCD Monitor

Avg. consumption

76 W

20 W

Screen color sensitivity

Extremely sensitive. Consumes lot more power (43% more) when displaying white on screen.

Completely insensitive. Consumes same power for all colors on screen.

Brightness setting sensitivity

Moderately sensitive. Consumes more power at higher brightness.

Sensitive. Consumes higher power for higher brightness

Contrast setting sensitivity

Less sensitive. (Almost insensitive when brightness setting is low.)

Completely insensitive. Consumes same power for all contrast

Consumption when turned off from computer power settings

2W

0 W

* Screen savers consume as much energy as when you are using screen. They save your screen pixels, but they burn away power.
* CRT monitor leaks power just like TV. Just FYI, a TV switched off using remote control does actually consume electricity (up to 20 Watts for some models). But the TV switched off using “OFF” switch is perfectly at rest.

Do we need our monitor at it’s brightest all the time? Do we need Microsoft Word background look like white paper? Can we write white over black instead of black over white? Can we all follow some monitor manners and save energy?

By following simple monitor manners below, in fact we can save lot of energy.

1. When not in use, simply switch off the monitor by hand.

2. If fits in your budget, buy an LCD monitor.

3. Use “blank screen” as a screen saver option.

4. If your computer allows power setting control (all laptops usually do), then change power settings to “turn monitor off” after 2-5 minutes. These setting are usually accessible somewhere around screen saver settings.

5. Right click on your desktop or background, go to properties>appearance tab>advanced. Now select “window” in the list and select a light gray color instead of white. Play around with schemes, use your creativity. Refer to the article

6. http://support.microsoft.com/default.aspx?scid=KB;en-us;q307855

7. But be careful while printing because you are not printing what you see. At such times, you can easily revert back to default scheme from display settings.

8. Reduce brightness settings, increase contrast settings.

OK, So what’s the big deal?

If you look at statistics below, you will see that it can actually be a big deal.

The USA has almost 574 personal computers per thousand population, among the highest in the world. Barring a few exceptions, each personal computer has a monitor with it. So for 292 million population, @574 per 1000, we have 177 million monitors.

Just following one or two of the above tips above, you can easily reduce your monitor’s average consumption by around 20 W. If 177 million people save 15W per monitor, it accumulates to a gigantic figure of 3500 Mega Watts, or 3.5 GigaWatts.

If you saved 3.5 Gigawatts, you just shut down four coal fired power plants in Texas, namely Gibbons creek (1 X 480 MW), Welsh (3 X 558 MW), Sandow (3 X 121, 1 X 591 MW) and Oklaunion (1 X 720 MW). That means almost 5.25 million lb CO2 emissions avoided PER HOUR. Yes, I checked my calculations twice.

This savings can be realized on your CRT monitor, not a single penny out of your pocket. A perfect conservation. If you switch to LCD, you save a lot more.

And while the environmentalists within you are drooling over the idea of closing down coal fired power plants, do not forget these additional benefits.

* If you are not saving this energy, then what is happening to it? It is getting converted to bright light and is going in your eyes. Our eyes are not designed to stare at bright white thing from 2 feet close, 8 hrs a day, whole life. They deserve a break.

With my new monitor settings, I find my eyes much more comfortable at the end of the day.

* Amory Lovins (www.rmi.org) once said “Any attempt to make the car lighter by 1 lb actually ends up in making the car lighter by 1 and half lb”. Because when you reduce body weight, you can use lighter chassis, then you need lighter suspensions and so on. Similarly any attempts to reduce monitor consumption by 100 watts actually end up saving overall 110 watts (figuratively speaking). Because to show you something on monitor, computer processor has to do work, hard disks need to be spun, video card must be fired up and fan must run faster to cool these things down. When monitor is off, all these things can take it a bit easy by a watt here and a watts there.
* Just for fun I calculated how much money I would save if I saved 15 Watts for 6 hours every day. Turns out that @ 12 cents KWH rate, I would be saving around $4.85 per year. OK, you cannot buy Lexus with this saving. But hey, at the end of the day, where would you rather put extra 5$? In Your pocket or in your utility provider’s pocket?

Moral of the story:

Just by making a small change in your computer habits, you can save some serious energy. Only thing you give up is an eye candy like screen saver. But if you consider the eye candy cost you are paying in environment terms, it is really worth it.

References:

  1. www.Internetworldstats.com for 2005 computer usage statistics
  2. www.Industcards.com for 2005 coal fired plants data
  3. US EPA Energy information administration EGRID 2000 database as referred by www.greenmountain.com
  4. US EPA National Vehicle and Fuel Emissions Laboratory EPA420-F-97-037 standards as referred by www.greenmountain.com
  5. http://www.energystar.gov/index.cfm?c=pm_mmd.pr_pm_mmd


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~ by Kedar on November 21, 2006.

145 Responses to “Saving Energy – One Monitor at a Time”

  1. There is another blog that has useful information about monitor power consumption.
    http://techlogg.com/content/view/360/9/

    Since this post is so relevant, I have edited the time stamp, so that this comment, even though written on March 30 2008, would appear right after the article was written.

    K

  2. Completely agree with you on that. Even if we do not reduce the brightness, but shutoff monitor on idle and everytime we leave our desk it will help a lot. I think companies should some policies about these kind of things, will help a lot.

  3. I am curious to know what contrast and brightness settings should be for long life of CRT? Will it give us long service if we keep brightness and contrast as low as possible?

    Regards,

    RAJHANS

  4. Hello Rajhans,

    I don’t know how to make them last longer by controlling settings. Probably digging out some theory on wikipedia or howstuffworks might help. Also here is an interesting discussion I found.

    http://forums.cnet.com/5208-7591_102-0.html?forumID=26&threadID=119944&messageID=1361073

  5. Yes, I did change all of my settings to a black background. But right now for some reason I can’t even see what I’m typing! Anyway, my question is, how do you change Microsoft word settings to not print a black background? I haven’t actually printed anything, but I all my print previews show a black background. Will this happen? If it does it might be hard for some people to always change backgrounds right before they need to print something.

    Overall, great ideas! I changed my settings and am passing the information along!

  6. The Mac OS X Universal Access preference uses the command, Cmd + Opt + Ctrl + 8, to toggle white on a black screen, back & forth. The command is global for all apps. When you reduce screen brightness all the way down (w/ white on black) the screen legibility does not seem to be affected at all. I have no idea if PCs have this capability?

    http://www.apple.com/macosx/features/universalaccess/

    With Parallel software (~$70) you can run both Windows XP and Mac OS X simultaneously on the new Macs powered by Intel Dual Core chips! Don’t know if this command would also switch the non-OS X OS’s?

  7. Ryan,
    About your screen view,
    Did you just change the window settings from Desktop->Settings?
    When you change color of window, you also need to change the color of font. The option to change font color is right below the option to change window color.Once you chance font color to white, you should see white text on black background.

    About printing, If you print, it will print just right. Even if the print preview shows black background, on paper it will still look black text on white background.
    I just mentioned there might be issue with printing, because I want people to make sure that they are seeing everything in the document before printing.
    Things you need to be careful about are
    1. The graphics (whatever you draw, lines,diagrams etc.) might not show correctly when you are viewing against changed background. Printing of this graphics will be fine.
    2. The images which you insert as jpg files etc. in your word document will be fine. But if the image is mostly black, it will be hard to see in window. Again, printing will be fine.
    3. If you have stuff like highlighted, colored text, etc, that will look different or might be hard to find depending on your contrast. But again printing will be fine.
    Hope I answered all your questions. Let me know if you have more.
    Thanks for your comment and passing this info on. :)
    K

  8. Very interesting post… I’ll change my screensaver right now and seriously consider a darker color for my backgrounds… But shouldn’t your blog template be also darker ? (uh… mine too…)

  9. Lol…
    Actually I am preaching all the change at local machine. Like my color config of browser is set such that I see a light gray in place of white color. But your point is noted.
    Makes sense. If CNN changes their color combination, then automatically electricity will be saved by millions of visitors going to their site.

    K

  10. Shutting down CNN would also save a lot of electricity…
    Black, eh ? I think I’ll pick the same template…

  11. [...] tried a new background color for my windows as shown here. Instead of the light grey suggested, I picked a very light brown: R 230 Y 222 B 188 (as shown on [...]

  12. . . .I love your math! Coal fired generators need to be a thing of the past. http://www.electricalternative.com

  13. [...] http://savingenergy.wordpress.com/2006/11/21/saving-energy-one-monitor-at-a-time/ [...]

  14. [...] of a CRT monitor. Yep. Someone out there measured the wattage and then posted on a blog about it, here.. You can also change your desktop background color to something that uses less wattage by looking [...]

  15. [...] shown in my previous article on computer monitor power consumption, colors on screen do not affect notebook monitor consumption, which is LCD panel. So the extra [...]

  16. [...] turn off your monitor when not in use – but it’s better to actually use the monitors off switch. An average CRT uses about 20w of power when idle. If your monitor is off for just 15 minutes more [...]

  17. Maybe I missed it, but would like some info on how much power an LCD monitor at rest consumes. I walked around today, and noticed almost everyone’s monitor’s on (although in “sleep” mode), I have to wonder how much is being consumed in this state.

  18. Good work. Another problem with screensavers is they usually fire up the 3D processing power on your video card, as well as forcing your CPU into high-power mode. I wouldn’t be surprised if the screensaver increased a modern machine’s power use by over 50W compared to idle.

  19. Great article and good argument for switching to LCD. I am currently debating getting rid of two CRTs and switching over to a single wide-screen LCD instead. Your calculations have just about convinced me this is the right thing to do.

  20. Actually having pixels active (not white) on an LCD screen means that transistors for pixel control need to be on (light blocking happens when power is applied to a pixel). So for an LCD screen white is the best (lowest power) Background color. But turning down the intensity is another good power saving. Or buying LCD monitors with LED backlighting.

  21. Inverters in most current LCD displays use quite a bit of power to light the small flourescent type tubes used in the display. Its also not the most efficient of devices. Using LED backlit LCD displays eliminates the need for the inverter (and the associated power loss in voltage magnification). Also I have read that LED baclights last longer give more consistent lighting and better contrast and colour reproduction.

  22. Power used to turn on a pixel is very small compared to say the power used by an inverter in and LCD display. But the higher the resolution the display is, the greater the difference in power consumption you will notice between a white screen (lowest power usage color) and a black screen (higher power usage color) on an LCD screen. The linked paper has done some work on power saving for LCD screens

  23. Great post. I hadn’t realized how sensitive monitors were to the color they were displaying. Good research.

    I’m adding you to my blogroll – can you do so for me as well?

    Nice post -

  24. Hey XOC,

    heck yeah, the screen saver fires up several other things and increases power consumption of cpu. You are right about that. I thought about that several times, but have not done any research. Any figures anyone?

    K

  25. Thanks for the paper Nik.
    I did not think about this variable, screen resolution.

  26. Kevin,

    Yours is a nice blog. Very relevant content to my topic. So added to the blogroll.

    Thanks,

    K

  27. [...] further reading on this topic, I recommend you the reading of the following article : ” Saving Energy – One Monitor at a Time “ from the blog [...]

  28. I am interested to find out more regarding how to save energy. Does it means by displaying darker colors, I will save more energy? For example, dark blue, dark green?

  29. Did you try changing the desktop color on the LCD, without changing the brightness level? I didn’t see a chart for this. Turning up the brightness on a LCD will send more power to the backlights, increasing power use. changing your desktop color however does NOT affect the strength of the backlighting, instead it affects how much light each pixel is letting through.

    My point is that a white background on a LCD should use the same power as black, or slightly less as Nik mentioned.

  30. I find the other version Darkoogle.com is more easier to read since they uses green text just like the old days. Green text are more easy for our eyes and reduce eye strain.

  31. Hey this might interest you:
    http://www.neroogle.com/en/
    Its a darker version of google (white text on black paper like you mentioned).

    I think your message is quite interesting and i’m about to turn off my screensaver :)

    grtz Pieter

    • Currently I run a VM at work that supports multi motoinr, but in reality just stretches the desktop across both screens and maximizes the window. I’m guessing that’s what you are seeing (my motoinrs aren’t identical either, so I’m probable a weird screen size too)

  32. A great little article. The tests you’ve done on this are really good. I was sent the link to the following search engine in an email.

    http://www.dooblavay.com/

    It’s a similar site to the previous comment but it all seems to be integrated in to the one site.

  33. Digg It :)

  34. kindly give me some info about power consumption monitor.. i will bw waiting for your email. pls send it at roberteestrada@yahoo.com thank you so much and GODBLESS

  35. [...] Environmental tip of the week #141 – IT equipment Posted August 21, 2007 Did you know that the IT industry responsible for the same CO2 emissions as the airline industry? Or that a fridge takes 2 x its weight in resources to make compared to a computer which uses 200 x? Here’s how you can reduce your IT footprint:1.      Modern flat screen monitors only use 40% of the energy of old-style CRT monitors.2.      It is best practice to switch your monitor off if you are away from your desk for ten minutes or more, and switch the PC off if you are away for more than an hour3.      For offices, new cool threads servers use 90% less energy and does not need air conditioning to cool. http://www.bris.ac.uk/environment/energy/saveenergy.htmlhttp://savingenergy.wordpress.com/2006/11/21/saving-energy-one-monitor-at-a-time/http://www.sun.com/servers/coolthreads/overview/ [...]

  36. [...] nella versione orginale Just for fun I calculated how much money I would save if I saved 15 Watts for 6 hours every day. [...]

  37. [...] contribution, as I already have an LCD display. These types of monitor already use less energy (explanation of that here). If I really want my computer to use less energy, I need to set my screensaver to blank screen and [...]

  38. I needed to know how much power does a normal monitor and a L C D monitor take and what is the cost in indian ruppess, kindly help in this deal, its realy great stuff

  39. [...] Se vi interessa ottimizzare il tutto anche dal punto di vista “hardware”, potreste cominciare dando un’occhiata alle seguenti guide pubblicate su Tom’s Hardware. Se avete qualche soldino da spendere, la costruzione di un PC alimentato completamente ad energia solare è per voi: Le basi del progetto, La scelta dell’Hardware e l’installazione del tutto. Se non ne avete voglia di cimentarvi nell’impresa ne denaro per comprare nuovo hardware, potreste cominciare la vostra lotta ai consumi con semplici consigli che troverete nelle guide Regole fondamentali per il risparmio energetico, Risparmiatori e Spendaccioni. Ho trovato anche un piccolo post riguardo ai risparmi che possano essere fatti utilizzando sapientemente il monitor. [...]

  40. Good work! You have any idea aboout Brightness/Contrast combination which suits our eyes.

  41. [...] This is a neat study about the savings in engery for LCD vs CRT.   The end result is LCDs use the same amount of energy displaying a black display as a white one, but I still like the idea.  Plus, it seems easier on the eyes. I like what Blackle is trying to do. Lots of little things do make a difference. And it’s a great reminder to keep doing little things. [...]

  42. Anybody want to calculate what mankind would save if we ripped all the status LEDs out of our TFTs/CRTs? I don’t need a little LED to tell me that my monitor is on, I can see that with my own eyes. Oh and optical mice, they use quite a lot of energy, too… so we better go back to basics, I guess.

  43. [...] even more depending on computer type, the jobs executed on the computer etc. This is excluding the power consumption of the monintor. Switching it off will not only save monitor power, but will also save in space conditioning energy [...]

  44. very nice post. but the graphs are too small to read easily.

  45. Thanks rocketpcguy,

    Yeah, you are right. Graphs are a bit hard to read. I will update as soon as I get time.

  46. I found your article very inspiring, i am about to lounch a campaign in campus to turn of monitors on computer labs when not used. However, I had a question about your calculations. The measurement of the energy consumed by an LCD scren (20W) in in how much time?

  47. Hello Jose, thanks for the comment. I am excited to know that you are about to launch a campaign. Please post results of your campaign over here, so others can see it.

    The measure Watts (20 W means 20 Watts), describes power consumed by the device in one second. To get the total energy consumed by a device, you need to multiply the Watts figure by the amount of time it was on.

    Most frequent unit of energy measurement is KWH, meaning Kilowatt hours. If a device that consumes one kilowatts (1000 Watts), is used for one hour, then the device would have consumed energy 1 KiloWatt Hour. Your utility bill will tell you how much a your electricity company charges you for 1 KWH. So you can calculate costs.

    Let me know if this makes it clear or you have more questions.

  48. Has anyone found any products that include an energy savings for laptop power supplies that are left plugged after the laptop has been disconnected and gone mobile?

  49. Good question. I am not aware of any.

    People have used power strips effectively to stop leaking power through a television etc. But indeed the plugged in chargers are still out loose, eating energy.

  50. I can support the theory about screen savers with some measurements. I had a problem with my graphics card temperature and got a program called I8kFanGUI to measure it. When I’m not using the computer and it’s busy I always have it in lowest-power mode, yet I noticed that the graphics card temperature was at a constant 56 degrees or so when I was away, and the CPU was at a similar level. When I came back and woke the computer up, the temperature of both WENT DOWN!

    I realised this was due to the screen saver – I think I just had the ordinary Windows one. However, switching the screen saver off all together didn’t help all that much. The dramatic difference was made by setting the “blank” screen saver. The graphics card temperature dropped 10 degrees and the CPU even more – and that was just in a few minutes.

    So this busts a myth about a myth. I’ve heard it said that it’s a myth that screen savers save energy. In fact, this is not strictly true: SCREEN SAVERS SAVE ENERGY – as long as they’re blank screen savers.

    Jose, please include this information in your campaign – the video card can still be busy even when the monitor is switched off, and modern cards burn lots of power.

  51. I read an article on apps. that you can get to reduce the amount of energy that your monitor uses; I be damened if I can remember what they are. I will look them out and post them on my energy blog.

  52. Hello Kedar, can I reference your blog in my website, as I believe your work is a convincing reason to turn down monitor brightness to reduce energy waste.

  53. Hello Jonathan,

    Thanks for asking. Please feel free to use my blog as reference. I hope more people read my article and save energy.

    Kedar

  54. [...] by playing with the levels until you find the minimal acceptable brightness for your work. The Saving Energy blog found that reducing a flat panel monitor’s brightness from 100 to 0 shaved 12 watts off of the [...]

  55. I have atarted doing some research for the company that I am working for. We are coming in line with being more energy efficient when I came across your article. I would like to use some of what I found as a refernece for people to check out in our quarterly newsletter.

    I thought that this article was very interesting and very informative. Would like to find more articles along this line to share with my users.

  56. Kedar,
    > OK, you cannot buy Lexus with this saving. But …
    if you spend your savings on a Lexus you won’t see an improvement in your emissions will you? :-) a better example would be subtracting the cost saving from your mortgage!

    I’m in an unfortunate position at the moment – I want to replace my inefficient, 10-year-old CRT monitor at home with an LCD monitor, but I can’t simply throw away the working CRT monitor (that’s electrical waste). I have to wait until it goes faulty. In the meantime I will alter my color-scheme too (I did my power settings but forgot about the old CRT!). It took me a while to realise I still had one. Now, where should I spend my $5…?

  57. http://www.localcooling.com

    Download the 100% FREE LocalCooling application and to automatically optimize your PC’s power consumption by using a more effective power save mode. You will be able to see your savings in real-time translated to more environmental terms such as how many trees and gallons of oil you have saved.

  58. You don’t need an application to save energy, most current operating system (and Vista’s power setting is extremely easy to fine-tune) have power management to lower screen brightness, lower screen brightness on battery (for laptops mainly), use power saving modes of device, and to aggressively save power by having it turn off monitor on idle, spin down hard disk, and go to sleep and hibernation quick. I’m an aggressive power saver, I set my laptop to turn off display in one minute, hard disk in two, and sleep in three, using laptop instead of desktop, choosing laptops that doesn’t have the most-high-end parts that have low performance-to-power/cost, using mobile processor that saves electricity. And I don’t consider myself an environmentalist.

  59. i must say, “very helpful blog there…”

    Thanks.

  60. [...] 2 more reasons….LCD’s are energy efficient than CRT’s, its much more easy to recycle as well. Saving Energy – One Monitor at a Time Saving Energy Processor Editorial Article – Is The CRT Monitor Dead? __________________ A grain of wheat [...]

  61. Good stuff. I’m an EE, but had never really thought about this. but, I have a couple of nits to pick.

    First, it’s not true that “reduce[ing] monitor consumption by 100 watts actually end[s] up saving overall 110 watts” in the way that you describe; the computer uses exactly the same amount of power to generate a complex animated 3D image and sending it to the monitor whether the monitor is on or off. It is true, though, that saving 20W by going to blank as the screensaver will save 22W (figuratively speaking) for the reasons you stated.

    Second, you asked “If you are not saving this energy, then what is happening to it?” and stated that it is going to bright light. While turning the brightness down is does indeed make life easier on the eyes, the light emission from the monitor is a trivial fraction of the power it consumes; the vast majority of it goes directly to heat. And that’s where the real secondary savings start. All that heat that is pumped into the home or office air is removed by air conditioners, which can make a huge secondary saving. In homes, the exception to this is that, in winter, the heat from monitors actually contributes to your heating. If you have electric heat then it’s a wash, and if you have some other more efficient form of heating you’re still coming out behind. Many office buildings use AC year round due to the large heat load of the people and equipment in them. So, figuratively, the 100W you save by turning the monitor off actually saves you 200W!

  62. Just FYI: I am currently experimenting to find ways to hack into the firmware of some types of monitor to reduce their power consumption, and plan to publish a guide on how to modify monitor screens so they use less energy if I succeed. If anyone has any tips or contributions that might assist the effort to reduce the energy needs of any type of computer display, please let me know. Any and all suggestions which help this effort are greatly appreciated.

  63. Nice post. Like that view on Computer Monitors.

    We have put up a review on our site of probably the worlds biggest computer monitor : http://www.krazywish.com/computer/worlds-biggest-computer-monitor/

  64. This is a very nice and illuminating post. I’ve written up a similar post, which ties up some of these things with real situations in India. It is here :- http://technologicalities.blogspot.com/2007/11/saving-private-power.html. You may want to take a look at it.

  65. Hello Kedar, I contacted you a while back about referencing your blog on my website. My website offers a power saving solution for ALL monitors by reducing the display of energy draining colors. We even offer image and video searches. I have pooled various resources from the internet, including your blog, the ecoiron blog, and the techlogg research findings. Please contact me so I can send you our press release. My site is adventgreen.com.

  66. KEDAR,IT’S A GREAT.REALLY I HEARTLLY APPRECIATE THE WAY IN WHICH YOU PUT ALL THIS STYFF.IT WOULD DEFINITELY HELP TO REDUCE ELECTRICITY CONSUMPTION.GREAT.

  67. Is there a way to actually cut power to the monitor (so that is is really off not just in stand by mode) via the graphics card if the computer has not been used for more than 2 hours?

  68. [...] machine yet, and surely heralds things yet to come.  For your monitor choice, here are some facts on monitor power consumption you may be interested [...]

  69. Damn good observation and suggestions.keep it up.

  70. Are your workings out an hourly rate?

  71. [...] background on your monitor to black, it will use less energy?  It’s true!  Check it out here if you [...]

  72. Thanks for such an important articles about coupon. This is a very needed info about online coupon, free coupon etc.

  73. [...] of an energy conscious consumer, CRT monitors should be at the bottom of the list. Kedar at Saving Energy conducted research comparing LCD and CRT monitors, and the results are drastically different. Here [...]

  74. Yes, I did change all of my settings to a black background.It work fine.

  75. From the data it is clear that is it best to Lower contrast settings but increase brightness settings. Cuz at a contrast of 50, figures for all screen colours even at a briteness of 100 are lower than those with a contrast of 100 and briteness of 0 !

  76. Chart 4 data INCONSISTENT with others.

    ” 8. Reduce brightness settings, increase contrast settings ” to conserve – is a wrong assumption.
    Your data proves otherwise.

  77. Hi,
    I have a small program in my site to switch off the monitor instantly. ( http://www.manumohan.com/d/m_off.exe )

    Which, IMHO, will be a useful one for laptop users.

  78. Its a any way good article , it would be more informative if some of the related research work
    reference would be provided. Still some people are working on various software display(forground and back ground) , like google blackle is one and there are some work from HP also. One request is please provide some related reference.
    Thanks ……

  79. Thank you so much for this article. It helped out a lot in my research for my company.
    Thanks.

  80. Thanks, this helped me a lot on my paper I’m writing for economics.

  81. Well if anyone is Truly interested in Saving Energy you will like this site. It says you can save upwards of 25% on your electric bill. At your home or business. Their Lighting manager for businesses even guarantee 20% or refund. If your company can save some money then they may lay off less people. I hope, I’m an optimist.

  82. is there a way to automatically dim computer monitor when someone visits your website.

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  86. [...] Saving Energy One Monitor at a Time Saving Energy Posted by root 6 hours ago (http://savingenergy.wordpress.com) Please note i have mirrored same post at http kedarsoman wordpress com 2006 11 21 just fyi a tv switched off using remote control does actually consume card must be fired up and fan must run faster to cool these things down mac os x simultaneously on the Discuss  |  Bury |  News | Saving Energy One Monitor at a Time Saving Energy [...]

  87. [...] Saving Energy One Monitor at a Time Saving Energy Posted by root 7 hours ago (http://savingenergy.wordpress.com) Please note i have mirrored same post at http kedarsoman wordpress com 2006 11 21 just fyi a tv switched off using remote control does actually consume card must be fired up and fan must run faster to cool these things down mac os x simultaneously on the Discuss  |  Bury |  News | Saving Energy One Monitor at a Time Saving Energy [...]

  88. [...] Saving Energy One Monitor at a Time Saving Energy Posted by root 1 hour 52 minutes ago (http://savingenergy.wordpress.com) Os x simultaneously on the new macs powered by intel dual core chips http savingenergy wordpress com 2006 11 21 saving energy one monitor at a time hello jose thanks for the comment i am excited to know that you are the monitor so that is is really off no Discuss  |  Bury |  News | Saving Energy One Monitor at a Time Saving Energy [...]

  89. [...] Saving Energy One Monitor at a Time Saving Energy Posted by root 13 minutes ago (http://savingenergy.wordpress.com) Please note i have mirrored same post at http kedarsoman wordpress com 2006 and mac os x simultaneously on the new macs powered by intel dual core chips hello jose thanks for the comment i am excited to know that you are about in homes the exception to th Discuss  |  Bury |  News | Saving Energy One Monitor at a Time Saving Energy [...]

  90. BUYING AN LCD MONITOR WILL NOT SAVE TREES!

    Just think for a second!

    Any “carbon footprint” decrease will be offset many times over by:
    the manufacturing process of making the monitor,
    the transport costs of getting it from a factory – in China for example – to your house
    the processes by which the raw materials used to make the monitor obtained
    disposing of your old screen.

    SO
    Stick with your old screen if you want to save the planet.
    Stick with your old car as well – for as long as you can.

  91. A very knowledgeble and helpfull things I found in ur article.
    It’s really helpfull to motivate people to think about saving power for themself and for our mother Earth.

  92. [...] Saving Energy One Monitor at a Time Saving Energy Posted by root 16 minutes ago (http://savingenergy.wordpress.com) But if the image is mostly black it will be hard to see in window hello jose thanks for the comment i am excited to know that you are about to saving energy one monitor at a time saving energy outdoor ceiling fans said the new macs powered by intel dual c Discuss  |  Bury |  News | Saving Energy One Monitor at a Time Saving Energy [...]

  93. I set up “turn monitor off” after 10 minutes and it help me for saving energy.

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  95. Thanks for this thorough report! People don’t often think of what it costs to leave electronic equipment running, including monitors. I would add that I think that the first step in saving on your power consumption is to be aware of what each of your appliances is costing you. If you plug your computer and monitor into a smart powerstrip, you can monitor and remotely control your power consumption from the Web or an iPhone application. Knowledge is power!

  96. really nice posting. Thank’s a lot for good reference ^_^

  97. I was searching for such an article. But sure you are saving our energy by setting dark background for your website.
    Such a symbolic instruction

  98. Great and very detailed post, thanks.

  99. Hi, according to my 19″ monitor manual, my monitor consumes 36 watts (max) how do I measure its power consumption when I use a black screen? thanks

  100. [...] Reduce your electricity usage. In a set of a computer system and a 19″ CRT monitor, the monitor alone can be good for half the total consumption. A 19″ CRT monitor consumes in between 80 to 120 watts, a comparable 17″ TFT flat-screen only uses 20W to 60 watts, reducing consumption by more then half! This results in savings on your electricity bill (*2) and an increase of the running time of your UPS or inverter in case of power failures. (read more in this interesting article) [...]

  101. awsome post on saving energy. My laptop turns off as soon as close of the monitor, which is a plus and this way it also collects less dust :)

  102. You know in recent years, I’ve done many things, to save energy and of course the best one was adding insulation to my home.

  103. Any “carbon footprint” decrease will be offset many times over by:
    the manufacturing process of making the monitor,
    the transport costs of getting it from a factory – in China for example – to your house
    the processes by which the raw materials used to make the monitor obtained
    disposing of your old screen.

    Comment by Admin February 23, 2010 @ 6:50pm

  104. [...] of your monitor that you can directly influence. If you want more details on this have a look at Saving Energy – One Monitor at a Time. Posted by ecomorrow Filed in [En] Start small Tagged: Energy, Monitor Leave a Comment [...]

  105. Well.This is a theme for me and yes, I did change all of my settings to a black background.It work fine.

  106. Well. I must congratulations to autor this article.A very knowledgeble and helpfull things I found in ur article

  107. People have used power strips effectively to stop leaking power through a television. This is good.

  108. [...] si merece la pena usar un fondo negro para ahorrar energia en nuestros monitores, he encontrado esta fuente, de la que os pego los [...]

  109. Hello from Germany! May i quote a post a translated part of your blog with a link to you? I’ve tried to contact you for the topic Saving Energy – One Monitor at a Time « Saving Energy, but i got no answer, please reply when you have a moment, thanks, Sprueche

    • Hello Sprueche,

      You can quote my blog, partial article or translate an entire article as long as credits are given to me and a link to my blog is included.

      I tried contacting you on the email you gave, but it bounced back.

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  111. I just like the style you took with this article. It isn’t often that you just find something so to the point and informative.

  112. really very nice data, i appreciate this.
    thanks a lot for providing this.

  113. That is great information!! Half the power on the monitor. Suggestion for saving more would be to unplug it when you are finish or turn the power cord off as there are tons of things that keep running.

  114. Well that is great review for me, with the help of this I quickly change my computer theme into black and light colors like grey as instructed, through the help of appearance setting. and I got very deep knowledge about various power saving Technics. I was enjoying reading through this all. Thanks

  115. I like this suggestion: When not in use, simply switch off the monitor by hand.Do you know which suppliers provide this option on laptops? I would like to get one.

  116. This is really interesting and very useful. I shall start to investigate how we can best implement these energy saving ideas on our screens. Many thanks for your research and the suggestions from other contributors.

  117. Always good to read about people’s initiative and enterprise. Wish somebody could come up with a way for us to harness the wind energy when we are sailing to power our laptops !

  118. Very interesting, but with more and more people using mobile phones and iPads etc to perform the tasks previously performed by their computer, perhaps screen consumption of power will become less of an issue, as they have much smaller screens.

  119. Found a big list of IPS monitors here: http://www.pchardwarehelp.com/guides/s-ips-lcd-list.php

    I boiught the HP ZR24w. Love it!

  120. [...] [...]

  121. very interesting. excellent read!

  122. Nice post, Thanks for your sharing.

  123. Simple things like tweaking the monitor settings can save a lot of power without any effect on usage.
    ————–
    Child Savings

  124. Excellent post. Very Nice… Keep it up..

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  130. I really like the info on this site, but the black background makes it impossible to read.

  131. nice one! 5*

  132. For gods sake, wtf is surprising on that at all?
    An CRT is a cathode ray tube: It accelerates a electron beam to high speeds to collide with the phosphor mask of the screen with heavy electro magnetic coils consuming a hell lot of energy.
    If I want the image to be brighter it has to gain the speed. Only a fraction of the electrons kinetic energy is transformed to light.
    The image is “constructed” dot-by-dot, line-by-line by deflecting this high speed electron beam – again by heavy, high powered electro magnetic coils.
    Black dots are just gaps in the beam (“switching the acceleration off”).
    So the brighter the more energy to accelerate is needed. The more energy to accelerate the more energy to deflect. But black needs no deflection and no acceleration.

    An LCD has a constantly lighted, energy efficient CFL “neon light”. The image is produced by a electronically controlled filter in front of this white illumination. The CFL is extremely energy efficient. The filter needs almost no power at all.
    Most LCD screens reduce the CFL illumination on showing a mainly dark screen.

  133. This immensely helped me for an assignment.. Not sure if i did it right, but got to know so many things as well! Thanks a bunch! :)

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  135. [...] Current generation notebooks use 30-50W under load while today’s desktop systems use 175-264W;  monitors add 12-20W (link). If hardware is 3-5 years old, power consumption is higher. An older system with a Pentium D may contain a 300W power supply, with a 19 inch monitor that adds another 76W if it is a CRT or 20W if it is an LCD (link). [...]

  136. Energy monitors are super handy…I found using a vampire plug helps as well. They sense when your monitor hits standby mode

  137. It is better to work on a well lighted environment and not to harm your eye. If the brightness of the screen is too bright then might as well go into the dim side of it that you still can see what on the screens.

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  140. Admiring the hard work you put into your blog and in depth information you offer.
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  141. Heya i’m for the primary time here. I came across this board and I find It truly helpful & it helped me out much.
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  142. “Science is a medium to understand the Nature in a better way”-Alfred Einstein (But that Science turned into a Frankenstein and started screwing the Nature….! The biggest mistake committed by him was aiding the Manhattan Prj …that’s Y he lost his sleeps in the last years of his life….as the Ghosts of Hiroshima and Nagasaki never pardoned him….)
    K……K……I’m coming to the Matter(stream)
    Actually turning off y’r Monitor (either CRT/LCD/LED….that doesn’t matter)
    never going to save much energy to U(the paradoxical truth is it may increase the energy consumption). Please, refer Newton’s first law. Some times we simply forget the basics. Chuckles……..And so with the gray screen saver Idea……:) Mistrust the obvious my dear buddy…….Unless otherwise somebody come with an Idea to make energy without burning Anything, the world is ENDANGERED :(
    Note:
    ===
    Sorry for being so pessimistic……

  143. Very efficiently written information. It will be beneficial to everyone who employess it, including myself. Keep up the good work for sure i will check out more posts. ebakbbgfdeed

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