All measurements are done using CalMAN 5.3 from SpectraCal and a custom workflow. An i1Pro and C6 meters are used to measure accurate colors and low light levels. For all test patterns I use APL 50% when possible to prevent backlight tricks and other things from skewing the results. Full field test patterns are used with the display uniformity testing.

With the backlight set to minimum the LG 34UM95 puts out 55 cd/m2 of light. That is a good number that is low enough to work for any dark environment, but not so low that you can’t use it. The brightness control operates in 1% steps giving you lots of room for adjustment. The maximum light level is 270 cd/m2. This is a bit lower than I would like to see, as direct sunlight will still wash things out, but it is decent. Most people likely will pick a setting in the middle of these and the brightness adjustment makes it easy to get the level you want.

White Level -  i1Pro and C6

Black levels are also very good. The minimum black level achieved is 0.0586 cd/m2 and the maximum level is 0.2724 cd/m2. The 21:9 monitors have been very good so far at getting low black levels and the 34UM95 is no exception.

Black Level - 1iPro and C6

These combine to give us a contrast ratio very close to 1,000:1. As this is now what I consider to be acceptable in a good IPS display, the LG 34UM95 does not disappoint.

Contrast Ratio -  i1Pro and C6

So far, so good for the 34UM95. Let's move on to the color accuracy.

Additional Features and Usability sRGB Test Bench
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  • SeanFL - Tuesday, June 24, 2014 - link

    Thoughts on moving from using two 24" 1920 x 1200 monitors to this one? I'll lose some horizontal pixels and pick up some vertical. Used mainly for video and audio editing.
  • scottrichardson - Thursday, July 3, 2014 - link

    SeanFL, I'm in the same boat as you. Running two Apple LED 24" Cinema displays but one is about to die. Apple doesn't sell a replacement display compatible with my 2009 Mac Pro, so I'm looking at this LG. The extra vertical resolution will be nice, and possibly more useful in many cases for my design/coding work.

    Wondering if there are any further updates on the backlight bleed issues?
  • SeanFL - Saturday, July 19, 2014 - link

    Scott, I picked one of these up a few days ago and am very impressed. No backlight issues that I can detect, and the display is beautiful. A much nicer display than the Dell Ultrasharp 2407. Not having a bezel in the middle of my workspace has also been an upgrade. Haven't missed any of the vertical pixels that I gave up when setting aside two 1920 x 1200 monitors.

    Now I'm looking for a mount to be able to switch between sitting and standing. The
    Ergotron LX seems like a nice fit.
  • SeanFL - Saturday, July 19, 2014 - link

    correction, make that horizontal pixels I gave up. btw, mine was manufactured June 2014, mentions rev02 on the back.
  • scottrichardson - Monday, July 21, 2014 - link

    That's great news Sean. I have mine ordered through my local computer store. They were told there's a 'worldwide shortage' and are not expected to hit the country until after the end of July. I don't mind waiting. Apple ended up replacing the panel in my 5 year old 24" LED display for FREE, which was very nice of them (after how much I paid for my Mac Pro setup, they felt it was fair!!!). Really looking forward to the display for the same reasons you are enjoying yours. No bezel in the middle, extra vertical pixels etc.
  • inperfectdarkness - Wednesday, July 9, 2014 - link

    Never! There shouldn't even be 22/9 screens. We need more 16:10 screens. Screw hollywood's ridiculous widescreen formats.
  • gochichi - Thursday, July 31, 2014 - link

    You're so right about this. Just to think about how simple the connection would be at this point to a 2560x1600 screen. I have no clue why 2560x1600 is stuck at a 30" display option and no other option. I would love to see 2560x1600 at 20", 23", 25", 27" etc. It would so awesome, and finding a computer or laptop with a DisplayPort is all that would be required. We can dream...
  • gochichi - Saturday, July 26, 2014 - link

    This technology segment has had a true lapse in innovation in very many years. So much so, that these obvious products finally coming is more than welcome. And if I have to bite my tongue and call it "innovation" then I will.

    I think that companies assume that people don't have decent eyesight way too much.

    Where is the obvious 23" 2560x1440? Where is it? Where in this stagnant,-no-good market is such a product? We have 11" laptops with 2560x1440... but no 20" or 23" desktop monitors?

    Well, I got tired of waiting, so I got the UP2414Q which is really fantastic. So much less dorky looking than the 27" displays. But it won't run flawlessly on every machine.

    Here's the difference between stupid reality, and the wonderful non-innovation that should really be: I WILL buy an $800-$1000 display for myself, but if the market weren't so retarded... I'd buy 70 units of 23" 2560x1440 IPS displays (with DisplayPort and HDMI) for $500 a pop. I'd buy 70 units, if not more.

    So this whole market is stagnant from sheer greed and this imaginary notion that nobody cares, where the reality is that anybody with a 2010+ MacBook (Air or Pro) would love nothing more than to plug into a 23" "retina" display for that price.

    Example of devices that run 2560x1440 flawlessly, but 4K at only 30Hz
    Surface Pro, X1 Carbon, MacBooks,

    Just to be completely clear, I would, and so many others would too... prefer to spend $500 on a 23" instead of the 27" units available for years now.

    I'm so disgusted with this market... sure this particular product is less stale than most, just like my Dell UP2414Q is also less stale. But why not have a vibrant product that everyone could enjoy? Why are they pretending that there's a niche market when the reality is that there's a massive, unaddressed market of people who want nice, and need practical. Of people that need other things on their desks other than a screen. Of people who have money but don't want to waste it on junk.
  • Gadgety - Friday, August 1, 2014 - link

    Thanks for the review. It's a tempting proposition when looking at the screen, but taking everything into account I find that $999 is too much money for what I'd get. I'll stay with a 29 inch 21:9 instead, and I'll get some daylight on my desk as well....
  • GerardFreeman - Tuesday, September 16, 2014 - link

    Can some one tell me what GPU will run this monitor at full res?

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