The default recommendation for a premium 4K TV
Infinite contrast, four HDMI 2.1 ports, brighter-than-ever OLED and the best gaming credentials at any price.
Our verdict
The LG C-series has been the default OLED recommendation for five straight years, and the C4 does nothing to change that. LG has pushed peak brightness to around 1,150 nits, which finally puts OLED in touching distance of Mini LED for HDR highlights without sacrificing perfect per-pixel blacks.
What stops it being a 5.0 for us: no HDR10+ support (LG quirk), and the C4 still cannot match a Mini LED like the Hisense U7N for full-screen brightness in a sun-flooded room. In any sensibly-lit UK living room, it is the best-looking TV most people have ever owned.
Key specs at a glance
- Screen sizes available
- 42, 48, 55, 65, 77, 83 inches
- Panel tech
- OLED EX (WBE)
- Resolution
- 4K (3840×2160)
- Refresh rate
- 120Hz native (144Hz PC)
- HDR formats
- Dolby Vision IQ, HDR10, HLG (no HDR10+)
- Peak brightness
- ~1,150 nits (10% window, tested)
- Processor
- Alpha 9 Gen 7 AI
- Smart platform
- webOS 24
- Gaming
- 4x HDMI 2.1, VRR, G-Sync, FreeSync
- Input lag (Game Mode)
- 9.1ms at 60Hz / 5.3ms at 120Hz
Pros
- Perfect per-pixel OLED blacks and infinite contrast
- Brightness boost: ~1,150 nits peak, up 20% on the C3
- Four HDMI 2.1 ports — industry best for gaming
- webOS 24 is genuinely fast and well-laid-out
- Dolby Vision IQ, Dolby Atmos and Filmmaker Mode
Cons
- No HDR10+ support (LG sticks with Dolby Vision only)
- OLED burn-in risk remains, however low
- Full-screen brightness still trails Mini LED rivals
- Speakers are thin — plan for a soundbar
Picture quality and OLED brightness
Out of box in Filmmaker Mode the C4 measures DeltaE 2.7 SDR and 3.6 HDR. Professional calibration brings SDR below 1.5.
Peak brightness is the headline upgrade over the C3. We recorded 1,147 nits in HDR Vivid and 980 nits in Dolby Vision Cinema. Full-screen sustained tops around 220 nits.
Gaming performance
Four HDMI 2.1 ports vs Sony’s two and Samsung’s one true 4K/120Hz on most SKUs. If you have PS5, Xbox, PC and Apple TV 4K, you want the C4.
Supported: 4K/120Hz on all four ports, 144Hz for PC, VRR across G-Sync Compatible/FreeSync Premium/HDMI Forum, ALLM, Dolby Vision Gaming. Input lag 9.1ms at 60Hz, 5.3ms at 120Hz.
In stock on Amazon UK
See today’s priceSound and webOS 24
Built-in sound is acceptable for news but thin for films. Plan for a soundbar — the LG SC9S magnetic mount is £999 or Sonos Beam Gen 2 at £399.
webOS 24 loads quickly, the Magic Remote pointer is the best TV input device, all major UK streaming services are present. Apple AirPlay 2 and HomeKit supported.
How the C4 compares
Against the C3: 20% brighter, adds 144Hz, new processor with better upscaling. Incremental but real improvements.
Against the Hisense U7N Mini LED: C4 wins on blacks, viewing angles and gaming. U7N wins on peak brightness, HDR10+ support and ~£500 less at 55-inch.
Frequently asked questions
Is the LG C4 worth the upgrade from the C3?
If you have a C3 working fine, probably not. Coming from C1 or older, the upgrade is more worthwhile.
Does the LG C4 have burn-in problems?
Modern OLED burn-in risk is dramatically reduced. Pixel-refresh runs during standby; warranty covers burn-in for one year.
Does the LG C4 support HDR10+?
No. LG sticks with Dolby Vision. Most major streamers lead with Dolby Vision so impact is small.
What sizes is the C4 available in?
42, 48, 55, 65, 77 and 83 inches in the UK. The 42 and 48 inch are popular as gaming monitors.
How does the LG C4 compare to the Sony A80L?
Sony has a more natural picture and better speakers but caps around 830 nits with fewer gaming features (only 2 HDMI 2.1).
Is the C4 good for gaming?
Exceptional. All four HDMI 2.1, Dolby Vision Gaming, VRR, ALLM, G-Sync Compatible. 9.1ms / 5.3ms input lag.
Our top pick in this category in 2026
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