Are you spending 25 cents a night to keep your computer on?
I had scoffed when a computer savvy friend scolded me for leaving my computer on all the time. You must really love Con Ed, she said. I didn't think I was using much electricity at all. In the large scheme I'm not. But if everyone does it every night, then we all are. Brower's project is a great reminder that even though our computer may sleep and the monitor may go dark, we are still wasting a lot of energy.
Obviously, the amount of power and money you waste depends on how energy efficient your computer is and how much you're paying for power. Arizona Public Service Company estimated how much it costs to run various office equipment.They calculated that a computer costs $39 to run 24 hours a day for a full year. A 15-inch monitor was $54. A laser printer was $44. Their calculations for what it saves by turning it off overnight were smaller than Bower's -- turning off all three would save $9, $12 and $14 a year. That's only 2.4 cents for just the computer overnight, but nearly 10 cents for all three.I'm also a little confused over what they mean by turning it off overnight. Does that mean it's an office computer, shut down at five? Or a home computer turned off at 10 or 11?
The power company makes another point: you'll save more on your power use by getting an EnergyStar computer than you will by turning it off overnight.