I am trying to convince my boss to switch our CRT monitors to LCD because it will save energy...?
Answers:
There are lots of considerations here. First of all, what is the age of the existing CRT monitors? If they are relatively new it might not makes sense to replace them right away.
If you were going to make a purchase decision today, clearly the LCD monitor would be the right choice. The Total cost of ownership (TOCO) for an LCD is much less (both purchase price and utility cost over an assumed life cycle are less). Overall, the power required to run an LCD is about one-third of that required for a CRT with the same screen area. In addition, the amount of heat generated by an LCD monitor is considerably less than a CRT monitor, resulting in a lower load on air conditioning. Building cooling needs could be decreased by up to 20%.
Without taking into account the building cooling needs, the energy cost of a typical 19" LCD monitor over 4 years of usage of 40 hours per week will be about $70 less. A typical 19" LCD is rated at 40W while a 19" CRT consumes 100W. This, of course depends on specific monitor specs and utility rates, etc. But it means, assuming a life cycle of 4 years, you can deduct at least $70 off the purchase price. The increased utility costs for cooling depending on your situation could make the cost differential over 4 years become $135. In all likelylihood, regardless of your specifics, more than 50% of the purchase price of a new 19" LCD monitor will be recouped by the energy savings.
You should also remember that a 19" LCD is larger than a 19" CRT (actual viewable area is 19" vs. 18" for the CRT). Savings can be realized through gains in productivity with larger monitors. Some research suggests that an employee may reclaim more than 17 hours per month working on a larger 19" screen versus a 15" monitor. But even a savings of 1 hour per month in labor cost yield savings of $180 per year. Of course the time saved has to either result in fewer hours worked, fewer people working, or the same people dedicated to other productive activity in order to actually reap those savings. For either a large or small business, a 19" monitor can easily pay for itself in productivity alone.
Furthermore, the perfect focus and geometry (straight lines are never warped) and the completely flicker-free screen of an LCD are easy on the eyes. This means that LCDs can be used comfortably for typically longer periods of time than CRTs. LCDs (like CRTs) have a refresh rate - only they have a longer residual "phospor" effect. In other words at a 60 Hz refresh rate the LCD is flicker-free. Better quality CRTs can also be easier on the eyes if they are driven at faster refresh rates - 85 Hz and up. All depends on the video card and monitor capability.
Replacing 60 computer monitors all at once might not make sense in terms of cash flow - that would require $12,000 if they were $200 each. You may want to begin a targeted phase out of some of the oldest, least efficient ones while considering which employees would benefit the most in terms of productivity. Also, disposal cost (if any) may be a negative cost to consider in terms of getting rid of the old CRT monitors.
Good luck!
They take up less space, can be made in more sizes, are easier to repair/replace (few CRT's are being made).
if you really want to save power look at VIA motherboards, they draw <1watt when idle.
Try reading this for some advantage:
http://www.pcreview.co.uk/articles/consu...
One thing I know about it is that the quality is much better and it actually prevents your eyes from being damaged by some kind of ray. I forget what. I read it in some web page when I bought my LCD monitor. It does work great. They also are flat and save space instead of some bulky thing that sticks out in the back. Very light as well.
Look at this link!
The reason CRT's are not good for the eyes is because they refresh themselves. If your have ever seen a film of a CRT screen - you will notice the lines that the camera captures - this is what bothers are eyes.
CRT's generate a considerable amount of heat compared to LCD'S- there would be savings in air conditioning.
The amount of space they take up is factor. LCD's take up far less space making for a more efficient desk.
LCD's have come down considerably in price.
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