TV3 Sunrise spreading FUD.

By Steve Biddle, in , posted: 17-Oct-2007 08:27

I turned my TV on a few minutes ago to see James Coleman and Carly Flynn in their office with a woman talking about recycling and energy savings in the office. Along with the usual solutions such as turning off PC's and recycling goods was the claim (while pointing at the Dell LCD monitor) that black pixels use less energy than white pixels so having a black desktop background uses less energy and the woman refers to a site www.blackle.com as proof of this. Unfortunately for her (and TV3) she's failed to check the full facts and infact many people listening to this advice will actually be increasing their energy consumption and not saving energy due to the differences between old CRT technology which has to use more power to create whites and LCD technology which has to use more power to create blacks.

Check out this detailed test http://techlogg.com/content/view/360/31/

In summary


There’s no argument that on CRT monitors, Blackle does reduce the power consumption but it’s not by the 15-watts claimed. We tested the four CRT monitors we could get our hands on and found that only one unit, an older 22-inch Compaq, showed the 15-watts or more power differential.

But with the LCD monitor market penetration worldwide now beyond 75%, it’s the LCD monitor power consumption that’s just as, if not more, important.

The most interesting aspect we found was that of the LCD monitors we tested of size 22-inches or less, all showed an increase in power consumption using Blackle. Beyond the 22-inch mark however, five of the six models showed a fractional decrease in power consumption when using Blackle, except the ViewSonic VX2835wm, which showed a 2.2-watt increase.

For the five that dropped their power consumption, the average drop was 3.16-watts, again, not the 15-watts being suggested.



Just because you heard it on breakfast TV doesn't mean it's true! Smile

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Steve Biddle
Wellington
New Zealand


I'm an engineer who loves building solutions to solve problems.


I also love sharing my views and analysis of the tech world on this blog, along with the odd story about aviation and the travel industry.

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*VoIP (Voice over IP). I work with various brands of hardware and PBX's on a daily basis
  -Asterisk (incl PiaF, FreePBX, Elastix)
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  -Patton
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*Telecommunications/Broadband
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*Wireless solutions
  -Motel/Hotel hotspot deployments
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*CCTV solutions
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I'm an #avgeek who loves to travel the world (preferably in seat 1A) and stay in nice hotels.


+My views do no represent my employer. I'm sure they'll be happy to give their own if you ask them.


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