Blackle

[Unsto]

http://www.blackle.com/

"How is Blackle saving energy?

Blackle was created by Heap Media to remind us all of the need to take small steps in our everyday lives to save energy. Blackle searches are powered by Google Custom Search.

Blackle saves energy because the screen is predominantly black. "Image displayed is primarily a function of the user's color settings and desktop graphics, as well as the color and size of open application windows; a given monitor requires more power to display a white (or light) screen than a black (or dark) screen." Roberson et al, 2002

In January 2007 a blog post titled Black Google Would Save 750 Megawatt-hours a Year proposed the theory that a black version of the Google search engine would save a fair bit of energy due to the popularity of the search engine. Since then there has been skepticism about the significance of the energy savings that can be achieved and the cost in terms of readability of black web pages.

We believe that there is value in the concept because even if the energy savings are small, they all add up. Secondly we feel that seeing Blackle every time we load our web browser reminds us that we need to keep taking small steps to save energy.
How can you help?

We encourage you to set Blackle as your home page. This way every time you load your Internet browser you will save a little bit of energy. Remember every bit counts! You will also be reminded about the need to save energy each time you see the Blackle page load.

Help us spread the word about Blackle by telling your friends and family to set it as their home page. If you have a blog then give us a mention. Or put the following text in your email signature: "Blackle.com - Saving energy one search at a time".

Have a look at our energy saving tips page for ideas on steps you can take to save energy.

There are a lot of great web sites about saving energy and being more environmentally friendly. They are full of great tips covering the little things that we can all do to make a difference today. Try Blackling "energy saving tips" or visit treehugger.com a great blog dedicated to environmental awareness."

[enc]

http://blogs.wsj.com/numbersguy/does-a-darkened-google-really-save-electricity-104/

The federal Energy Star program, which encourages consumers to cut their energy consumption, had someone do a quick test for me and found that modern LCD computer monitors don’t see much benefit from a black screen.

the savings are most likely to accrue from older CRT (cathode-ray tube) monitors, rather than the more-modern, more-compact, more-energy-efficient LCD (liquid crystal display) screens that have come to dominate the market (representing three quarters of all monitors world-wide as of last year, by some estimates).

“We found that the color on screen mattered very little to the energy color consumption of the LCD monitor,” said David Korn, principal at Cadmus, which specializes in energy and environment, and does work for the government.The changes were so slight as to be within the margin of error for the power meter

The bulkier CRT screen did see savings with Blackle of between 5% and 20%. Mr. Korn emphasized that this was a quick test, not a rigorous study.

Άρα ισχύει μόνο για τις CRT οθόνες. Κλασσικά marketing tricks...

[zakan]

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[enc]

Το blackle είναι ουσιαστικά το google με μαύρο background. Οι δημιουργοί του υποστηρίζουν οτί αν όλοι οι χρήστες του google χρησιμοποιούσαν blackle θα γλιτώναμε κάμποσα megawatt τον χρόνο σε κατανάλωση ρεύματος από τις οθόνες (το μαύρο καταναλώνει λένε λιγότερη ενέργεια για να προβλήθει). Αλλά έγιναν έρευνες που απέδιξαν ότι αυτό ισχύει μόνο για τις CRT οθόνες. Στις LCD δεν έχει καμία διαφορά, και μάλιστα η αλλαγή από άσπρο σε μάυρο καταναλώνει παραπάνω ενέργεια!