Therefore, each screen uses more than twice as much power when set to the highest setting. Both screens set to lowest brightness: 251 WĪccording to these results, each screen uses 22 W of power on the lowest brightness setting and 49 W of power on the highest brightness setting.One set to highest brightness, one set to lowest brightness: 278 W. ![]() Both screens set to highest brightness: 305 W.When the displays enter sleep mode (while the computer is still running), the wattage drops to 207 W.īelow is a summary of the tests I ran on my computer with two displays. When I set both screens to the lowest wattage, the wattage falls another 27 watts to 251 W. When I set one screen to the lowest brightness setting, the wattage drops to 278 W, saving 27 watts. When both displays are set to the highest brightness setting, my computer and the two screens use a total of 305 watts (measured with my APC XS 1500 UPS). My current workstation is a Mac Pro with two 20" LCD displays. Fortunately, you can substantially reduce the amount of energy your monitor uses by dimming your display. While flatscreen LCD screens use less energy than those clunky old CRTs, they can still consume a lot of electricity. ![]() You may be surprised how much energy your computer monitor uses. ![]() This month, I have another simple and practical way to save energy: dim the brightness of your computer screen. Last month, I highlighted the importance of using your computer's sleep mode to conserve energy. Share Lower Your Display Brightness April 2011 - Tip of the Month
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