LG C8 OLED TV Review

Updated Apr 13, 2018 at 04:33 pm
LG C8 OLED Picture
This TV was replaced by the LG C9 OLED
Type OLED
Sub-Type
WRGB
Resolution 4k

The LG OLED C8 is a great 4k OLED TV with excellent picture quality. The emissive technology allows it to produce perfect blacks, which is excellent for dark rooms. The image also remains accurate when viewed at an angle, which is great for those with wide seating. It performs well with HDR content, as it can produce very bright and saturated highlights. The motion handling and input lag are also excellent, so it feels very responsive to gamers or PC users. It isn't perfect though, as the brightness changes depending on the screen content and static images shouldn't be shown for long on the TV due to temporary image retention and the risk of burn-in.

Our Verdict

8.9 Mixed Usage

Excellent TV for a wide range of usages. The LG 55C8PUA has perfect blacks, resulting in excellent dark room performance. The TV handles motion extremely well due to the instantaneous response time and ability to flicker the image at 60Hz to clear up motion. The picture also remains accurate at an angle, which is great for those with wide seating. Reflection handling is excellent for rooms with lights or glare on the screen.

See our Mixed Usage recommendations
9.4 Movies

Excellent choice for watching movies in a dark room. Perfect blacks result in deep and detailed dark scenes. The TV can display most content without judder, but some stutter is visible due to the low frame rate of movies - especially for wide panning shots.

See our Movies recommendations
8.6 TV Shows

Great choice for watching TV in a bright room. Reflection handling is excellent, which is great for rooms with lights or glare on the screen. The TV also has a good brightness to overcome ambient light. The WebOS smart platform works well for casual browsing or watching content on Netflix. For regular watchers of channels with a lot of static content, there may be a risk of burn-in though (see here).

See our TV Shows recommendations
8.8 Sports

Excellent for sports fans. Motion handling is excellent due to the instantaneous response time and ability to flicker the image to clear up motion. Dirty screen effect is also not an issue, as the screen is very uniform. Picture quality is also excellent, and remains accurate when viewed at an angle which is great for large numbers of people to watch an important game.

See our Sports recommendations
9.0 Video Games

Excellent TV for gamers. Input lag is very low, so the TV feels very responsive. Motion handling is excellent due to the instantaneous response time and ability to flicker the image to clear up motion. Picture quality is also excellent due to the perfect blacks.

See our Video Games recommendations
9.1 HDR Movies

Excellent for watching HDR movies in a dark room. Picture quality is excellent due to the perfect blacks and impressive uniformity. The LG 55C8 can produce very bright highlights in real scenes and also produces saturated colors, to make HDR pop. The fast response time does result in some stutter, especially when viewing movies in long panning shots.

See our HDR Movies recommendations
8.8 HDR Gaming

Impressive HDR gaming performance. Input lag is very low, so the TV feels responsive with HDR. Motion handling is excellent due to the instantaneous response time and ability to flicker the image and clear up motion. Picture quality is also excellent, and the TV can make HDR scenes pop due to the high peak brightness of highlights and ability to produce very deep colors. For people who play games with a lot of static content there may be a risk of burn-in though (see here).

See our HDR Gaming recommendations
8.4 PC Monitor

Great choice for PC use. Image remains accurate when viewed at an angle so the sides of the screen are uniform. Supports chroma 4:4:4 for clear text across all backgrounds. Also, the LG C8P supports a 1080p @ 120Hz input for those who want the most fluid experience. Motion handling is excellent, due to the instantaneous response time. Unfortunately the brightness of the screen changes depending on the content and areas of static content may have a risk of burn-in (see here)

See our PC Monitor recommendations
  • 8.9 Mixed Usage
  • 9.4 Movies
  • 8.6 TV Shows
  • 8.8 Sports
  • 9.0 Video Games
  • 9.1 HDR Movies
  • 8.8 HDR Gaming
  • 8.4 PC Monitor
Pros
  • Can produce perfectly deep and uniform blacks
  • Instantaneous response time
  • Image is accurate when viewed at an angle
Cons
  • May be a risk of permanent burn-in (see here)
  • Brightness changes with screen content (ABL)
  1. Update 2/28/2019: Converted to Test Bench 1.3. Learn more about our versioned test bench system here.
  2. Update 12/11/2018: We have received a few notes that the 77'' model makes a hissing sound.  If you experience this, we suggest that you contact LG. 
  3. Update 11/27/2018: We have retested the C8 on firmware 04.10.06, and have updated the peak brightness and input lag.
  4. Update 10/5/2018: We have retested 24p playback with firmware 04.10.05, and the C8 is now able to remove Judder from all sources, unless BFI is enabled.
  5. Update 5/4/2018: The SDR peak brightness window tests were retested using our Samsung K8500 Blu-ray player, rather than from a PC as originally published. This was done to keep the test results consistent with the 2017 TVs, because they were all tested using the Blu-ray player. The C8 measures a little brighter from the Blu-ray player, but not majorly.
  6. Update 5/2/2018: The color gamut was erroneously measured at a 50% stimulus. It has been remeasured at 75% stimulus to be in line with our other TVs.

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Video

Test Results

Design
Design
Stand

The stand is wider than last year's C7, this time taking up nearly the full width of the TV, so it may be hard to fit on some tables. It supports the TV well and is very sturdy. It is made of aluminum with a hard plastic finish.

Footprint of the 55" TV stand: 35.0" x 9.2"

Design
Back
Wall Mount VESA 300x200

The rear of the LG C8PUA is very similar to the C7. Basic cable management, only a small removable cable guide as seen here. The 4 HDMI inputs face to the side, but the composite input is rear facing and may be difficult to access if the TV is wall mounted. The controls are located on the back to the side, similar to the C7.

Design
Borders
Borders 0.35" (0.9 cm)

The borders of the LG OLED C8 are very thin and look very good. There is almost no gap between the border and the first row of pixels.

Design
Thickness
Max Thickness 1.89" (4.8 cm)

The top half of the screen is exceptionally thin, comparable to last year's C7. The bottom half houses the electronics and is thin and it sits flush to a wall when mounted

Design
Temperature
Maximum Temperature
93 °F (34 °C)
Average Temperature
88 °F (31 °C)

The TV stays fairly cool across the entire screen. There are a few warm spots on the back but not warm enough to cause any issues.

9.0
Design
Build Quality

The overall build quality is excellent. The TV is solid and there were no obvious build issues or gaps. Care should be taken when moving the TV as the top is very thin.

Picture Quality
10
Picture Quality
Contrast
Native Contrast
Inf : 1
Contrast with local dimming
N/A

The LG OLED C8 is an OLED panel, and as such has an infinite contrast ratio since individual pixels can be turned off. This results in perfect blacks when viewed in a dark room, great for Horror or Sci-Fi fans.

10
Picture Quality
Local Dimming
Local Dimming
No
Backlight
N/A

There is no need for local dimming on an OLED screen like the C8, as there is no backlight. This video is for reference only.

7.6
Picture Quality
SDR Peak Brightness
SDR Real Scene Peak Brightness
318 cd/m²
SDR Peak 2% Window
345 cd/m²
SDR Peak 10% Window
345 cd/m²
SDR Peak 25% Window
344 cd/m²
SDR Peak 50% Window
345 cd/m²
SDR Peak 100% Window
163 cd/m²
SDR Sustained 2% Window
331 cd/m²
SDR Sustained 10% Window
331 cd/m²
SDR Sustained 25% Window
333 cd/m²
SDR Sustained 50% Window
332 cd/m²
SDR Sustained 100% Window
158 cd/m²
SDR ABL
0.059

Good SDR peak brightness on the LG OLED C8, almost identical to last year's C7. Real scene brightness is bright enough for most rooms. Highlights do not stand out in SDR. The TV remains consistent at ~350 cd/m² except when showing a large bright scene, like our 100% test window, where the screen dims significantly due to the Automatic Brightness Limiter(ABL).

With an 'OLED Light' setting of 40 or less, the fluctuations between scenes due to ABL drops to 20 cd/m² or less.

Update 05/04/2018: The brightness window tests were retested using our Samsung K8500 Blu-ray player, rather than from a PC as originally published. This was done to keep the test results consistent with the 2017 TVs, because they were all tested using the Blu-ray player. The C8 measures a little brighter from the Blu-ray player, but not majorly.

Update 11/27/2018: We retested with the latest firmware and found that, while the HDR brightness remained generally unchanged, the SDR brightness decreased by 50 cd/m² in all but the 100% window which remained unchanged. Results found above are updated.

7.6
Picture Quality
HDR Peak Brightness
HDR Real Scene Peak Brightness
666 cd/m²
HDR Peak 2% Window
979 cd/m²
HDR Peak 10% Window
918 cd/m²
HDR Peak 25% Window
511 cd/m²
HDR Peak 50% Window
328 cd/m²
HDR Peak 100% Window
159 cd/m²
HDR Sustained 2% Window
915 cd/m²
HDR Sustained 10% Window
876 cd/m²
HDR Sustained 25% Window
492 cd/m²
HDR Sustained 50% Window
303 cd/m²
HDR Sustained 100% Window
151 cd/m²
HDR ABL
0.106

Good HDR Peak Brightness, slightly brighter than last year's E7P and much brighter than Sony's A1E, especially when showing small highlights. Real scene HDR Brightness is very good, but still short of the 1000-4000 cd/m² HDR is mastered for. Large bright scenes are very dim due to the Automatic Brightness Limiter(ABL).

Update 11/27/2018: We retested with the latest firmware and found that the HDR brightness remained generally unchanged. Results found above are updated.

8.7
Picture Quality
Gray Uniformity
50% Std. Dev.
1.495 %
50% DSE
0.117 %
5% Std. Dev.
0.562 %
5% DSE
0.097 %

Excellent gray uniformity on the C8. There are some very faint vertical lines visible on our 50% test, these are mostly visible in very dark uniform scenes. Only slight dirty screen effect in the center, which is good for watching sports.

Update 04/27/2018: When the TV shows very dark gray shades, like our 5% gray uniformity test, vertical and sometimes horizontal bands are very visible across the screen. This was also an issue with all 2017 and 2016 OLED TVs we tested, including the Sony A1E. It shouldn't be an issue in most normal content, but in some very dark scenes it can be visible.

8.8
Picture Quality
Viewing Angle
Color Washout
48 °
Color Shift
28 °
Brightness Loss
67 °
Black Level Raise
70 °
Gamma Shift
70 °

Very good viewing angle on the LG C8PUA, as is typical of OLED screens. Black levels remain perfect regardless of viewing angle. Colors shift when viewing off access, but the shift is not as severe as other TVs like the Samsung Q8C. This TV is a great fit for a large room with side seating.

10
Picture Quality
Black Uniformity
Native Std. Dev.
0.230 %
Std. Dev. w/ L.D.
N/A

The OLED55C8PUA has perfect black uniformity, with no clouding due to its ability to turn off black pixels. This TV is especially well suited to watching movies in a dark room.

9.5
Picture Quality
Reflections
Screen Finish
Glossy
Total Reflections
1.3 %
Indirect Reflections
0.1 %

The OLED C8 has excellent reflection handling. The glossy screen results in very defined reflections, but at a very low intensity. The anti-reflective coating gives reflections a purple tint, similar to other high-end TVs like the E7 and Q8C. The results are excellent and there should be no issues using this TV in a bright room.

8.1
Picture Quality
Pre Calibration
White Balance dE
2.52
Color dE
2.11
Gamma
2.15
Color Temperature
6055 K
Picture Mode
Expert (Dark Room)
Color Temp Setting
Warm 2
Gamma Setting
2.2

The most accurate results before calibration were on the 'Expert (Dark Room)' picture mode, with the Gamma setting changed to 2.2. Out of the box, the color accuracy and white balance are good, although the temperature is a bit warm so the colors are shifted a bit yellow.

9.6
Picture Quality
Post Calibration
White Balance dE
0.11
Color dE
1.09
Gamma
2.20
Color Temperature
6496 K
White Balance Calibration
20 point
Color Calibration
Yes
Auto-Calibration Function
Yes

Excellent color and white balance dE after calibration, better than the C7 and Samsung's Q9F. While the calibration out of the box was already very good, after calibration the colors were nearly perfect. Gamma follows our target almost perfectly.

You can see our recommended settings here

8.0
Picture Quality
480p Input

The C8 upscales older 480p content well. The resulting image quality is not overly sharp.

8.0
Picture Quality
720p Input

There are no issues upscaling 720p content.

9.0
Picture Quality
1080p Input

The LG OLED C8 upscales 1080p content played from a Blu-ray or game console well. There were no obvious issues.

10
Picture Quality
4k Input

Native 4k input is displayed as intended.

8.5
Picture Quality
Color Gamut
Wide Color Gamut
Yes
DCI P3 xy
96.64 %
DCI P3 uv
98.13 %
Rec 2020 xy
70.44 %
Rec 2020 uv
73.98 %

Excellent coverage of the P3 color space, nearly identical to the C7 and E7 from 2017.

The HDR EOTF in the 'Technicolor Expert' picture mode follows our target PQ curve very well until it rolls off at the TV's peak brightness. The EOTF in 'PC' and in 'Game' are very similar to that of 'Technicolor Expert', although 'Game' is brighter than the other two.

When displaying HDR content in 'PC Mode' colors appear washed, the C8PUA does not detect the wide color gamut and the setting cannot be changed.

Update 05/02/2018: The color gamut was erroneously measured at a 50% stimulus. It has been remeasured at 75% stimulus to be in line with our other TVs. The results remain almost identical.

Update 11/27/2018: We retested with the latest firmware update (04.10.06), and the PC Mode issue has been corrected.

7.0
Picture Quality
Color Volume
Normalized DCI P3 Coverage ITP
79.9 %
10,000 cd/m² DCI P3 Coverage ITP
44.5 %
Normalized Rec 2020 Coverage ITP
60.9 %
10,000 cd/m² Rec 2020 Coverage ITP
33.9 %

Decent color volume, similar to last year's C7 and B7A, but much worse than the Samsung QLEDs. The C8 has decent coverage of the P3 color space, but is unable to produce overly bright, saturated colors. This will be noticeable in bright outdoor scenes when watching Movies or TV Shows.

9.1
Picture Quality
Gradient
Color Depth
10 Bit
Red (Std. Dev.)
0.084 dE
Green (Std. Dev.)
0.089 dE
Blue (Std. Dev.)
0.077 dE
Gray (Std. Dev.)
0.053 dE

The LG OLED C8 displays our test gradient smoothly with no significant banding. In certain scenes there is some banding noticeable in large areas of similar color. This can be reduced by enabling 'MPEG Noise Reduction', which toggles the gradient smoothing feature of the C8. This reduces the visible banding but also results in a loss of fine detail.

8.3
Picture Quality
Temporary Image Retention
IR after 0 min recovery
0.53 %
IR after 2 min recovery
0.11 %
IR after 4 min recovery
0.00 %
IR after 6 min recovery
0.02 %
IR after 8 min recovery
0.00 %
IR after 10 min recovery
0.00 %

The TV shows some signs of image retention even after 4 minutes of recovery time.

This test is only indicative of short term image retention and not the permanent burn-in that may occur with a longer exposure to static images. We are currently running a test to help us better understand permanent burn-in. You can read about our investigation into this here.

Note: There is some variation between panels even of the same model. Some panels may be more or less prone to image retention.

1.0
Picture Quality
Permanent Burn-In Risk
Permanent Burn-In Risk
Yes

Update 11/01/2019: Updated text to include our stance on burn-in.

Although we don't expect most people who watch varied content to have any issues, OLED TVs, such as the LG OLED C8 do have the possibility of experiencing burn in.

The LG C8 has three features to help mitigate burn-in. We recommend enabling the 'Pixel Refresh' and 'Screen Shift' options and setting 'Logo Luminance Adjustment' to 'Low'

You can read about our investigation into this here

Picture Quality
Pixels

With WRGB OLEDs all four subpixels are never on at the same time, so we have two photos.

Alternative pixel picture.

Motion
10
Motion
Response Time
80% Response Time
0.2 ms
100% Response Time
1.7 ms

Like all OLED TVs, the response time is nearly perfect. There is some slight overshoot when transitioning from a black frame, such as in the 0-20% and 0-80% transition, but this should not be noticeable. The response time is excellent when watching fast-paced movies or sports, as the TV has no ghosting/movement trails during fast motion.

10
Motion
Flicker-Free
Flicker-Free
No
PWM Dimming Frequency
0 Hz

Like all OLED TVs, there is no visible backlight flicker which helps motion appear smoother, but it does result in some persistence blur. This is much better than the Samsung Q7F or LG SJ9500 with their 120 Hz flicker, where duplications will appear during motion.

8.7
Motion
Black Frame Insertion (BFI)
Optional BFI
Yes
Min Flicker for 60 fps
60 Hz
60 Hz for 60 fps
Yes
120 Hz for 120 fps
No
Min Flicker for 60 fps in Game Mode
60 Hz

The LG OLED C8 has an optional BFI mode to help reduce blur. This is new this year for LG OLEDs, although Sony did implement it on last year's A1E. On the C8 this is enabled by setting 'Motion Pro' to 'On'. With 120 fps content the C8 drops every other frame.

10
Motion
Motion Interpolation
Motion Interpolation (30 fps)
Yes
Motion Interpolation (60 fps)
Yes

The TV uses motion interpolation (commonly known as the Soap Opera Effect) to artificially increase the frame rate of lower fps content up to a much smoother 120 fps. Motion Interpolation can look strange to many people, and it creates artifacts. In scenes with a lot of motion, the C8 stops interpolating the extra frames to avoid creating artifacts, preferring accuracy over smooth motion.

To enable this feature when watching lower frame rate content, set 'TrueMotion' to 'User' and adjust the 'De-Judder' slider for low frame rate content (such as 30 fps), and the 'De-Blur' sliders for 60 fps content.

4.8
Motion
Stutter
Frame Hold Time @ 24 fps
40.0 ms
Frame Hold Time @ 60 fps
15.0 ms

The C8, like all OLED TVs, has a near instantaneous response time. This results in each frame remaining static for nearly 40ms when watching 24 fps content which creates noticeable stutter. The stutter can be reduced by enabling motion interpolation to increase the frame rate.

10
Motion
24p Judder
Judder-Free 24p
Yes
Judder-Free 24p via 60p
Yes
Judder-Free 24p via 60i
Yes
Judder-Free 24p via Native Apps
Yes

Update 05/13/2019: The settings required to remove Judder have changed. We've updated our text below.

Update 05/10/2018: We retested 24p playback on the C8 with firmware version 04.10.05, and it is now able to remove Judder from all sources, except when BFI is enabled(Motion Pro set to 'On').

The TV is consistently able to remove judder from native 24 fps content, whether that content is played from the native apps or external sources such as a Blu-ray player. It can also remove judder consistently from 60 fps content.

To enable this feature when playing 24p content from an external player, the 'Real Cinema' option must be turned on. Previously, it was required to set the TruMotion sliders to '0' as well.

0
Motion
Variable Refresh Rate
Native Refresh Rate
120 Hz
Variable Refresh Rate
No
G-SYNC Compatible
No
4k VRR Maximum
N/A
4k VRR Minimum
N/A
1080p VRR Maximum
N/A
1080p VRR Minimum
N/A
1440p VRR Maximum
N/A
1440p VRR Minimum
N/A
VRR Supported Connectors
N/A

The LG C8PU does not support any of the variable refresh rates technologies such as G-Sync, FreeSync, or the native VRR which will be available in HDMI 2.1.

Inputs
9.1
Inputs
Input Lag
1080p @ 60 Hz
21.1 ms
1080p @ 60 Hz Outside Game Mode
50.0 ms
1440p @ 60 Hz
N/A
4k @ 60 Hz
21.1 ms
4k @ 60 Hz + 10 bit HDR
21.5 ms
4k @ 60 Hz @ 4:4:4
21.1 ms
4k @ 60 Hz Outside Game Mode
50.0 ms
4k @ 60 Hz With Interpolation
100.0 ms
8k @ 60 Hz
N/A
1080p @ 120 Hz
21.9 ms
1440p @ 120 Hz
N/A
4k @ 120 Hz
N/A
1080p with Variable Refresh Rate
N/A
1440p with VRR
N/A
4k with VRR
N/A
8k with VRR
N/A
Auto Low Latency Mode (ALLM)
No

Very good low input lag, similar to the C7P. In game mode, the input lag is very low regardless of resolution, and outside of game mode the input lag is lower at 4k than the C7, and is one of the lowest we have ever tested.

The input lag was slightly higher in 4k @ 60 Hz + HDR. This result is highly unusual and has been retested to verify the results. The input lag is still low, and should feel very responsive.

Update 11/27/2018: We retested with the latest firmware update (04.10.06) and found two previous bugs had been fixed. Now 4k in HDR has the same input lag as in SDR and 4k @ 60Hz @ 4:4:4 + 8 bit HDR is properly being displayed and has been measured.

8.3
Inputs
Supported Resolutions
1080p @ 60 Hz @ 4:4:4
Yes
1080p @ 120 Hz
Yes (native support)
1440p @ 60 Hz
No
1440p @ 120 Hz
No
4k @ 60 Hz
Yes
4k @ 60 Hz @ 4:4:4
Yes
4k @ 120 Hz
No
8k @ 30 Hz or 24 Hz
No
8k @ 60 Hz
No

Most of the common input resolutions are displayed properly without any issues. The TV does not support 1440p resolution. When connecting to a PC, the HDMI input must have its icon changed to 'PC'. 4k @ 60 Hz @ 4:2:2 or 4:4:4 color is only supported when 'HDMI ULTRA HD Deep Color' is enabled in the 'Picture/Additional Settings/' menu for the chosen input.

The new α9 processor also supports 120 fps files in 1080p when played from a USB drive.

Update 11/27/2018: We retested with the latest firmware update (04.10.06) and 4k @ 60Hz @ 4:4:4 + 8 bit HDR is now displayed properly.

Inputs
Input Photos
Inputs
Total Inputs
HDMI 4
USB 3
Digital Optical Audio Out 1
Analog Audio Out 3.5mm 0
Analog Audio Out RCA 0
Component In 0
Composite In 1 (incl. adapter)
Tuner (Cable/Ant) 1
Ethernet 1
DisplayPort 0
IR In 0
SD/SDHC 0

The C8 does not have a component input. It does support composite input via the included adapter. Surprisingly, the TV has 3 USB 2.0 ports, and no 3.0 ports unlike the 2017 C7.

Like the 2017 OLEDs, the OLED C8 does not have an analog audio output. To connect a wireless headphones you will need a digital to analog converter like this one.

Inputs
Inputs Specifications
HDR10
Yes
HDR10+
No
Dolby Vision
Yes
HLG
Yes
3D
No
HDMI 2.0 Full Bandwidth
Yes (HDMI 1,2,3,4)
HDMI 2.1
No
CEC Yes
HDCP 2.2 Yes (HDMI 1,2,3,4)
USB 3.0
No
Variable Analog Audio Out No
Wi-Fi Support Yes (2.4 GHz, 5 GHz)
Inputs
Audio Passthrough
ARC
Yes (HDMI 2)
eARC support
No
Dolby Atmos via TrueHD via eARC
No
DTS:X via DTS-HD MA via eARC
No
5.1 Dolby Digital via ARC
Yes
5.1 DTS via ARC
Yes
5.1 Dolby Digital via Optical
Yes
5.1 DTS via Optical
Yes

Update 02/27/2019: While the TV doesn't support Atmos passthrough via a Dolby TrueHD carrier signal (common in Blu-ray disks), it is advertised as supporting Atmos passthrough via Dolby Digital Plus, which is the Atmos format used by some sources like Netflix; our testing confirmed this passthrough on the LG C8.

Sound Quality
7.4
Sound Quality
Frequency Response
Low-Frequency Extension
63.50 Hz
Std. Dev. @ 70
3.86 dB
Std. Dev. @ 80
4.09 dB
Std. Dev. @ Max
5.00 dB
Max
90.0 dB SPL
Dynamic Range Compression
3.73 dB

The LG C8 has an above-average frequency response. The LFE (low-frequency extension) is at 64Hz, which is also above-average and much improved over last year's model, the C7. This means that the bass won't be able to produce any thump or rumble, but it'll have a decent amount of punch and body to it. The frequency response above the TV's LFE is well-balanced, and it has a self-calibrating system, but this doesn't completely correct the modes of our test room (the bumps between 200Hz and 300Hz). Additionally, this TV does pretty loud, and doesn't produce too much pumping and compression artifacts under maximum load.

7.0
Sound Quality
Distortion
Weighted THD @ 80
0.078
Weighted THD @ Max
0.547
IMD @ 80
3.06 %
IMD @ Max
7.68 %

The C8 has a decent distortion performance. The THD response is rather elevated, which is typical of most TVs and doesn't increase too much under maximum load either.

Smart Features
8.5
Smart Features
Interface
Ease of Use
Easy
Smoothness
Very Smooth
Time Taken to Select YouTube
2 s
Time Taken to Change Backlight
7 s
Advanced Options
Many

The webOS interface is split into three sections: settings, inputs and apps. The menus are more responsive than last year. A new quick access button has been added in the top right for easy access to the search function. The interface is easy to use and fast to navigate, but first time users may find it confusing.

0
Smart Features
Ad-Free
Ads
Yes
Opt-out
No
Suggested Content in Home
Yes
Opt-out of Suggested Content
No

The C8 did not display ads during our testing, but there is an option in the menu for advertising cookies so the TV may have ads at some point or in certain regions.

Update 04/27/2018: We have received reports of Ads in the C8 app store, at least in Russia.

Update 7/12/2018: We have found ads on other 2018 LG TVs as shown here, so we assume all 2018 LG TVs have ads. The score has been updated to reflect this.

8.0
Smart Features
Apps and Features
App Selection
Many
App Smoothness
Average
Cast Capable
Yes
USB Drive Playback
Yes
USB Drive HDR Playback
Yes
HDR in Netflix
Yes
HDR in YouTube
Yes

Like the rest of LG's lineup, the C8 comes preloaded with most of the most popular apps, including Netflix, Amazon Video, and YouTube.

9.0
Smart Features
Remote
Size
Large
Voice Control
Many Features
CEC Menu Control
Yes
Other Smart Features
Yes

The remote itself is nearly identical physically to last year's C7. It has a limited selection of controls, allowing control of basic functions and quick access to the settings and search menus. When pointed at the TV the remote acts as a pointer, which when combined with the scroll wheel found in the center of the directional pad allows quick access to all options.

Voice control is now much better, on par with Samsung's service, and allows you to control other LG devices powered by ThinQ, including lights, air conditioners, etc... The TV will also be compatible with Amazon Alexa and Google Home later in the year. The basic commands we tried worked very well, and allowed us to search YouTube, switch inputs, change some settings, and even ask about the weather. In order to use voice control features (known as ThinQ AI) you must consent to sharing your viewing information and voice information, since the TV offloads certain requests to an external service. We don't know what exactly is shared with LG so if you are concerned about privacy, this should be left disabled.

7.0
Smart Features
Remote App
Acts as the Remote
Yes
Directly Launches Apps and Inputs
Both
Inputs Text in YouTube
No
Inputs Text in Netflix
No
Streams Device Files
Yes
Controls TV Settings
No
Voice Control
No

The LG TV Plus app offers some interesting features such as streaming music and video directly to the TV, but lacks some basic functions found on other apps, including text entry. The app can also be used to control the cursor.

Smart Features
TV Controls

Like almost all LG TVs and monitors, the C8 has a single rocker joystick on the back of the TV. It works very well and allows quick access to most functions of the TV.