Power efficiency, but at what cost ?
Sat, Jan 15 2011 11:26
My old’ish LCD monitor chews about 50 to 55 watts; the new LED backlight monitors of the same size use about 30 Watts. That’s roughly HALF the power !!
But when I do the sums, assuming the monitor is on for 10 hours a day for 300 days a year, the difference is about 60 to 75 kWh, which in today’s prices of about $0.22 per kWh, is from $13.20 to $16.50 saving each year.
Given that wouldn’t even be the equivalent of interest on the cost of the new monitor, it’s far from being a financial argument for buying a new monitor. And considering manufacturing, packaging and transportation environmental costs, it’s unlikely to be an environmental argument in favour of a buying a new monitor. It just isn’t “green” to go replace existing electronics based on power savings alone. About the only time it does make sense is the replacement of light globes
So it looks like I’ll have to find another reason to upgrade to a LED backlit screen “one day”.
Hmmm… I wonder if there are any health aspects such as better for your eyes ?