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That is the power consumption when the monitor is run at its maximum brightness. Typically you would use it with about 140cd/m2 then it will consume about 22 watts.
Take a look at the site prad.de. They have extensively tested the Dell U2410 and Dell U2412.
For the Dell U2412M they report a different maximum consumption: about 35 watts.
Can you help answer these questions from other members on NexusFi?
The tests published on that site look very professional and they include indeed what I have looked for, which is the power consumption of each monitor under normal operating conditions.
I cannot trust in the values published by the manufacturers, as they are not comparable.
This is just a summary, which I found on the site. The most interesting column is the power consumption calibrated to 200 Watts, which is close to an operation under normal working conditions. THe Dell U2412M has not yet been tested. I believe that it it is part of the midrange monitors that were rated as fair.
I must admit that I have written the original post, because I had the hope that somebody would contradict my opinion. This is actually what happened. I had overlooked the fact that I do not need to use a monitor with maximum brightness. The power consumption measured by PRAD for the Dell U2412M is 34 Watts (not 75) for maximum brightness, and 24 Watts for 50% brightness. If I compare this to my current monitors, I may expect a typical consumption of 27 Watts with this monitor. That is good enough for me.
There are only few monitors, which are really suited for a trading station. I definitely prefer 24'' (27 would be too large). I absolutely insist on 16:10, a pivot allowing to have the screen upright, and I have a strong dislike for brilliant reflecting surfaces. Also I do not want to spend more than $ 350 per monitor.
This limits my choice to 3 or 4 monitors from Samsung, HP and Dell, and the U2412M is probably the best value for money. My major argument against the purchase of this monitor has been refuted, as is does not consume 75W as indicatored on all data sheets.
I stayed away from LED screens because of a optometrist's short article online saying they were bad for your eyes - now there are a bunch saying there's no major difference. But after a few months of using an iPad for movies, browsing, mail - my mid and long range vision is not as sharp (I have it at about 40% brightness). So I dug around last night.
It may sound silly to site a lone optometrist in China who agrees, but this article came out yesterday, also eastern medical care is largely focused on preventing health issues to begin with. (1)
The Association for Research in Vision and Ophthalmology did a study finding increasing damage /cell death in the retina of rodents according to the levels exposed of too much 403-nm blue light and the duration of that exposure - so it's not unfounded. (2)
Blue LED lights put out an intense, single wavelength blue, that is 20 times as strong as the other colored LEDs and needed to give the appearance of a white screen. (3)
There are some other, less alarming, side affects in the third source. There was permanent damage to some rodents vision after an hour of about .4 mW/cm2 of 403-nm blue so I'd be interested in what an iPad puts out.
I got a good deal on E-bay for 4 used dell ultrasharp 2007FP S-ISP (early model) screen (20 inch square screen, 1600x1200, 16 ms response time). They do run hot, but it's manageable with a small fixed position desk fan behind them blowing up and away of that corner of guest bedroom turned office, during summer.
Three monitors are used for trading and because the screens are smaller I don't have to change posture or move around much to have a clear read on 6 open charts, 3 DOMs and one time and sales window (no level 2). I took a picture but can't figure out how to post it off the iPad just yet.
A setup where one 24inch monitor could be laid almost flat (so you could view it like a book on table), then two square 20 inchers behind it could be nice, but no luck coming across a desk easily modified to accommodate.
I have finally bought 3 Dell U2412M monitors and I am quite satisfied with the result. First class design, brilliant picture, adjustable in any way you want, excellent viewing angles, no smell, noise or flickering.
I have now measured the power consumption of the monitors under my normal operating conditions (brightness 40%, contrast 75%) and the result has exceeded my expectations. Each monitor consumes about 14 W only.
Actually my whole trading station (Xeon E31240), with an internal and external harddisk and including the three monitors consumes about 100 W, with peaks of up to 160 W under heavy duty. Now replacing the light bulbs in my office with LEDs, as the bulbs consume more power than the PC.....
The only weak point of the Dell monitors is the color perception. If you have three monitors and set them all to white, each of them has a slightly different tone. Calibration via the RGB settings allows for compensation, but you won't find the setting for a perfectly adjusted white tone. But as long you are not into professional imaging, this is really unimportant.
For little over $ 300 per monitor, it is an excellent buy.
Yes, I have considered that monitor. In my opinion it is quite similar to the Dell monitor. It is non-reflecting, has a resolution of 1920 x 1200 and is perfectly suited for the purpose. The prices for both monitors here are quite similar.
Right now I have the five U2412M's in portrait mode, using the original manufacturers stand. But at least daily, for watching videos, webinars, etc, I really wish I had a monitor in portrait mode (to get 1920 vs 1200).
With the hex stand, I think I can add a sixth monitor while not adding to much overall length to my configuration (roughly 10 inches or so), and the total height would seem to be acceptable as well -- with all six configured in portrait mode.
Haven't decided yet... but either way, the stands from Tyke Supply are top notch (have used several), and I am also extremely pleased with my monitor purchase.
I had last paid $279 per monitor in late September 2011. Unfortunately, you have to add $23.02 in tax to that, for a total of $302.02. This was through Dell directly.
