Reviewed on May 12, 2014

LG LB5800

Usage Ratings - Version 0.9
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Test Benches: test

  • 1.2: Winter 2018
  • 1.1: Summer 2017
  • 1.0: Winter 2015
  • 0.9: Winter 2014
  • 0.8: Winter 2013
Mixed Usage
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Score components:
  • 74% Picture Quality
  • 19% Motion
  • 7% Inputs
Recommended if under (USD)
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What it is: Maximum price to be a better value than its competitors.
How to use it: This product is the best choice in its range if you can find it below this price.
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This tv has been discontinued.
It was replaced by the LG LF5800

The LG LB5800 LED TV is far from perfect. It has low contrast and reflects a significant amount of light. On the upside, it has a good viewing angle for an LED and a low amount of motion blur.

  • Great viewing angle. The colors stay consistent when you view it from the side.
  • Low input lag and a low amount of motion blur. This is a great gaming TV.
  • You need a wide table to accommodate the stand.
  • Poor contrast. The blacks are gray.
  • Significant amount light reflected. The screen also gets a yellow tint when the room is bright.

Test Results
Picture Quality 6.6
Motion 8.5
Inputs 7.5
Smart Features 7.5

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LG LB5800 Design

The LG LB5800 LED TV has a matte gray frame. The TV is quite thick due to its direct lit LED backlight.

LG LB5800 Stand

The stand is separated into two pieces, on both sides of the TV. Even with the 42", we had to use our extension to put it on our table.

LG LB5800 Borders

0.7" (1.7 cm)

LG LB5800 Thickness

2.2" (5.6 cm)


Picture Quality

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Score components:
4k : No
6.0 Contrast
LG LB5800 Contrast
Black : 0.125 cd/m2
White : 98.69 cd/m2
Contrast : 790 : 1

The contrast ratio of the LG LB5800 is low. In a dark room, the blacks are gray and the shadow details aren't good.

8.0 Black Uniformity
LG LB5800 Black Uniformity

The black uniformity is not perfect, but it isn't bad either. Small issues are more evident though, because of the poor black levels.

5.0 Gray Uniformity
LG LB5800 Gray Uniformity

Our unit had gray uniformity issues. We couldn't see it in normal videos, but it was noticeable in panning shots.

7.4 Viewing Angle
Viewing Angle : 33 °

The viewing angle has always been the strong suit of LG LED TVs. The LB5800 is not an exception. The colors stay saturated even when viewed from the side. This is great for large families.

7.0 Average Room
LG LB5800 Average Room
Reflection : 2.5 %
Surface Type : Semi-gloss

The LG LB5800 has a rainbow effect around lights and it gives the screen a yellow tint. It also reflects more than the average LED.

8.7 Bright Room
LG LB5800 Bright Room
Max white : 328 cd/m2

The reflection issues are even more pronounced in a bright room. The screen is washed out by a yellow tint. At least the screen can get very bright.

0 3D
3D : No


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Score components:
8.5 Motion Blur
LG LB5800 Motion Blur

The LB5800 has a higher response time than average (the red between the letters of our logo is pink), but it does have nice backlight strobing, so the picture is still defined.

Motion Interpolation
LG LB5800 Motion Interpolation Picture
Motion Interpolation : Yes


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Score components:
7.5 Input Lag
LG LB5800 Input Lag
Input Lag : 49.4 ms

In game mode, the input lag is average-good and you won't notice it in video games.

Side Inputs
LG LB5800 Side Inputs


Rear Inputs
LG LB5800 Rear Inputs

1 Component In
1 Composite In
1 RF In
1 Digital Optical Audio Out
1 Ethernet


Smart Features

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Score components:
  • 100% Smart TV
7.5 Smart TV
LG LB5800 Smart TV

This LG TV does not come with the new WebOS platform. It still uses the old smart interface. It works fine, but it isn't as pretty or user friendly.

LG LB5800 Remote

The included remote is very basic. Don't expect to use it to browse the web with any ease. You control the cursor with the arrows on the remote.


7.0Mixed Usage
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Score components:
  • 74% Picture Quality
  • 19% Motion
  • 7% Inputs
The LG LB5800 LED TV isn't a bad TV, but you will gain by spending a little bit more to get the Samsung H6350. When the lights are turned off, the LG has gray blacks and when the lights are turned on, it has reflection issues.
Questions Found an error?

Let us know what is wrong in this question or in the answer.


Questions & Answers

I got the LB5800, but I am having this issue. Whenever there's a dark scene, the whole backlight darkens as well, and when the scene becomes brighter or has a brighter image that isn't black or a darker color, the backlight will return to normal or brighten, so if something flickers onscreen, the backlight/screen brightness will flicker as well. It basically changes the whole backlighting based on the scene or piece of content on the screen like some kind of weird auto-dimming. I made sure the energy saver is set to "off" as well other settings that might intrude on backlight performance, like dynamic contrast. Is it suppose to do this, or is it a hardware problem? I have set the TV to either Game, Cinema, or Standard, and they all have this issue. 
Have you tried our settings? Using our settings, the LB5800 didn't have that issue. It is probably due to the Expert1 mode that we used. That issue is actually a feature found in most LED TVs, but rarely exposed directly.
Does the LB5600 have the same image quality as the LB5800?
It should be similar, yes.
Update: We tested the LB5600 and it indeed has very similar picture quality to the LB5800.
Is there any difference in picture quality between the 47LB5800 and the 47LB6300? Also, the motion blur scores very highly on the 47LB5800. Is there any difference with the 47LB6300 model?
We are picking up our LB6300 today. The review should be up tomorrow. Stay tuned.
Update: The picture quality is about the same.
Would you be able to review the LG LB5900?
Maybe in a few weeks, but not soon. We plan on reviewing some Vizio TVs first. The LB5900 also has an IPS panel, so we expect the picture quality to be very similar to this LB5800.
Update: We tested the LB5900. The picture quality is indeed similar, although the screen reflects slightly less light.
If I changed the gamma, do I have to change any of the calibration settings that you've provided in the pictures on the calibration page, or could I still use your settings while setting a different gamma level? I am using 2.4 instead of 2.2 gamma, because it helps with details in darker areas, and almost gives off an HDR appearance. Think of it like taking an HDR photo at night or darker environments.
You can use the same settings (except the white balance).
I have the LG 42LB5800-UG! I want to use a bluetooth connector on this unit in order to use a bluetooth headset! Any suggestions on a type, compatible to my LG?!
You can use a device like this one.
Does the 42 LG lb5600 have an IPS panel, or do I have to get the 42lb5800 if I want an IPS panel? I don't need any of the smart features. I just want an IPS panel.
Yes, both have IPS panels.
Alright, I used your settings for calibration, except for a few settings. I have TruMotion turned on, as well as edge enhancement, etc... So this technically doesn't affect the calibration since I'm still using the same basic picture and white balance configuration as shown in the pictures, right?
Is it okay to keep Real Cinema turned on while using cable/OTA TV, and what affect this have when enabled? Is it some sort of reverse 3:2 pulldown?
Yes, it's fine to leave it on. Whenever Real Cinema mode detects 24p content, or anything with 3:2 pulldown, it changes the frame rate to 24 fps. It won't affect anything else.
I want to see the actual refresh rate while displaying 24p with TruMotion turned up to the highest (dejudder 10). Is there a way I can test the max refresh rate/fps of the TV? I cannot find information on the actual max refresh rate of this TV online (it's practically unknown), only good guesses. It's becoming a thing where you aren't allowed to know the actual specs of a TV.
You can't. No TV displays the active panel refresh rate - just that of the input. That said, you can film it with a high speed camera if you really want to see it (something that we did in our 2013 reviews, but stopped because it wasn't really useful).
What's the max sharpness I can use with your calibration settings and still retain a natural picture? I want to use a higher sharpness other than 0.
0 means no sharpness added. It won't be the original picture as soon as you increase it. Therefore, there isn't an absolute answer to your question, because it is a personal preference. Try a few values and see what you like.
Can you list the 39" as an AMVA panel? It has been confirmed to be AMVA by several people and the only panel type available for 39" TVs is AMVA. That's why LG isn't calling the whole line IPS like they do for the LB6300. Thanks.
Updated. Thanks for the info.
I looked at LB5800 and LB6300 in many shops with bright fluoro overhead lighting, and none of them showed any hint of yellow tint. I turned the screens off and really examined the colour of the reflection and it was always black and looked identical to Samsung's and Sony's. What is going on? Is it only a certain type of light that reflects a yellow tint? Fluoro lights are blue tinted, so maybe that's the difference?
In our studio, we are using 5500k CFL light bulbs, which is more blue than old incandescent bulbs (around 3000K). The yellow tint isn't very apparent. It is more an issue for direct reflections, not ambient, which is why you can see it more in our pictures of the very bright setup, around our test window. I wouldn't worry as much about the yellow tint as for the amount of reflections. It does reflect about 50% more than other TVs with the same type of finish.
Do I have to or should I return/replace/repair my new LG LB5800 HDTV for one stuck/bright pixel dot thing on the screen? It's located on the lower center-right. It's like a bright stuck pixel, but is not limited to one color. If anything it's mostly green, but can appear yellow or blue or some other color depending on the color of the background. The pixel starts to darken once the screen darkens to the color black or grey or something. It's not very bright at all on darker colors, but brighter/colorful colors make the stuck pixel seem brighter, and when it switches to a darker image like a black or darker background the pixel dims down and becomes almost non-existent. Should I return the TV?
If it is still inside the retail store's return time frame, just exchange it. One simple trick that does sometimes work is to apply slight pressure to the pixel and turn the TV on and off. Works about 50% of the time for stuck pixels (not dead ones).
Any upcoming review for the LG 42lb5500?
No, but we will review the 42LB5600 in 1-2 weeks.
Is this review for the 42lb5800?
Yes, we reviewed the 42" model. It should also be valid for other sizes, though.
I have an lb6500 3d smart. I read that the lb6300's lag is about 33ms. Is the lb6500 in this range and can you test this TV? I've looked all through forums and can't find a thing on my new TV. I previously had the w600b 48" and didn't like it. It's bright and has good contrast, but it's grainy as well and is the same as the 6350, which I see that you push highly. So let me know, please. I want to know what this thing's input lag is, the lg lb6500. And I have it set to game console on the input and to game for picture.
We won't have time to test the LG lb6500. It is basically the same exact TV as the LG LB6300, but with 3D added. The input lag should be the same.
What did you guys use for your settings?
They are posted on page three.
Do you test and review TVs prior to calibration, or do you review them after calibration? If the TV has been reviewed before calibration, does that mean that when using your calibration settings I will get better black levels than what are shown in the review?
We review after calibration. The blacks won't be better.
Is it possible that this TV's motion interpolation performance can be improved with a firmware update, or is it a hardware component that is separate from the software and cannot be altered in terms of performance and capability? I notice that the Sony TV that we have performs better, looks smoother, and doesn't have as many visible artifacts around objects when engaging in a higher setting. It just seems more professional looking and performs better.
It is probably done via a dedicated chip, so I doubt it can be improved via an update. Even if it could, TV manufacturers (including LG) rarely update the firmware to improve picture quality. Usually, firmware updates are only for major bug fixes.
Since this is technically a 60hz TV with motion interpolation, how would they fit 24 into 60fps for movies when running Blu-ray or watching movies on cable TV? According to multiple people, 24 doesn't fit well into 60 because of the math of multiples. For example, 24x5 = 120, which would fit into all 24, 30, 48, 60, 72, 96, and 120 framerates. If this is 60hz, I'm pretty sure it would have been more convenient to make it 120hz with the motion interpolation feature, because technically it's limited in performance. It would be really helpful if LG can provide more information on this, because I still have a feeling this can very well be a 120hz display, however it seems my research and your testing of this display reveals it most likely is 60hz. What baffles me is if it doesn't kick past 60, why would they even have it turned on by default under the "smooth" setting with the sports picture mode, since sports broadcasting already runs at high framerates? There must be more to this that we don't know. Even if I talked to LG staff, they wouldn't know anything about the technicality or core specifications for the set itself. I am really curious and interested, because I want to know how my TV actually functions, so I can be relieved. Like most manufacturers they just leave me with unanswered questions. I think they need to stop using inflated numbers or at least show the real one alongside.
The LG LB5800, along with most 60hz TVs released in 2014, has native 24p support, meaning the TV can change its refresh rate to suit a media source that is 24p. The issue of 60 hz TVs having difficulty with 24p content has for the most part been resolved - it's no longer an issue if the source frame rate does not fit into a multiple of 60.
The way the interpolation feature is presented by the TV is indeed misleading, and we can't say for sure why it is enabled by default in the sports picture mode.
You said this TV has a backlight strobing feature. This basically means the backlight turns off and on rapidly between changing frames, right? Can this reduce the lifespan of the backlight? Also, does it work by basically preventing moving objects from losing clarity and contrast when they move fast across the screen, but doesn't change the actual blur trails or response time? I've read from you that backlight strobing doesn't really help with actual blur, but just increases the clarity of the letters in your test. On my Samsung TV I had previously (model UN22F5000), I had a feature called LED Clear Motion, and it reduced the brightness and picture quality in favor of keeping extra detail when things move across the screen. I didn't like it that much because it reduced brightness and picture quality significantly. If backlight strobing doesn't really help with the problem, according to your tests, what do you think it's really good for?
Yes, backlight strobing involves the backlight rapidly turning on and off between pixel refreshes. The LG LB5800's backlight strobing is a bit different from the Samsung UN22F5000's Clear Motion setting, though. It is a less aggressive form called PWM, which is used to control the luminosity of the backlight. So while it does produce some of the increased clarity that you'd get with something like LED Clear Motion, it's not quite as big of a difference. Using this kind of feature should not affect the lifespan of your backlight.
You are right that using backlight strobing will not change the actual blur. Its usefulness is in how it enhances the clarity of objects on the screen, but it will not change the length of blur trails or the response time.
We are not taking any more questions for this product because we no longer have it in our lab.