How much do you save with LCD monitors?: My wife and I are slowly switching our entire house over to flouresent light bulbs — you know, those spiral looking things? We’re doing this because we’re sick and tired of changing burnt out incandescent bulbs, and these are supposed to last so much longer. They also use a lot less power. The bulbs I got are meant to replace 60-watt incandescent bulbs, yet they use just 23 watts. Bonus.
This got me thinking about power consumption, and then about LCD monitors, since they apparently use much less power than an equivalent CRT. I have a 19” CRT that has served me well, but is getting a little dimmer with every passing month. I thought, if I I could prove significant power savings, then perhaps my wife would let me buy a nice, new flat panel.
I found this article over at CNet which, sadly, doesn’t quite prove my case, but is interesting nonetheless. The savings are there, but they’re not quite enough to justify a 17” LCD (about $400 minimum), which I would need to equal the screen area of my 19” CRT. Too bad.
…the approximate cost of using the LCD 24 hours a day is $3.74 per month. If you use this device for three years, the extended power cost for the life of the device would be $134.78.
By comparison, if you had a CRT device consuming 90 watts with the same usage requirements, its monthly power consumption would be $6.48, and its three-year usage cost would be $233.68. So simply using the LCD device for the same requirement over three years of 24-hour usage would give a savings of nearly $100. In locations with high energy costs (such as California), this savings can exceed $130 over the three-year term (assuming a $0.14 rate).
You also have to consider that these calculations assume the monitor is running 24 hours a day, which mine isn’t. It’s more like two hours. So that puts my power savings down to less than $10 over three years.
Just the other day, however, I visited a brand new customer service call center. They had all brand new equipment, including 15” LCDs on each desk. I wondered at the time how they could justify the purchase of LCDs when they’re still twice as much as CRTs and desk space didn’t seem to be an issue. But when you consider that these monitors are on 24 hours a day, perhaps the power savings is enough to influence the decision.