'It's looking good': I've been testing the LG C6 OLED TV and these are the top 3 things it improves from its predecessor — and one where it still struggles

A worthy successor

26 Apr 2026, 12:00 by https://www.techradar.com/uk/author/james-davidson · TechRadar

Features By James Davidson published 26 April 2026

(Image credit: Future)

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LG’s C-series OLEDs are arguably among the most popular TVs released every year, thanks to their versatility, performance, and value for money. While still a premium TV for many, it's often one of the most competitively priced for what it delivers.

Last year’s LG C5 was one of the best TVs I’d tested, and while it didn’t bring tons of changes from the LG C4 – other than a moderate brightness boost and an updated processor with more AI features – it was still a superb TV that brought across everything great about the C4 and built on it further.

The C5’s successor, the LG C6, has landed in our testing labs, and I’ve been putting it through its paces, including placing it side-by-side against the C5. Based on my testing, it’s a solid upgrade, bringing more improvements than the C5 delivered over the C4.

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It’s worth noting that the C6 model I’m testing, the 65-inch, uses the same kind of WOLED EX panels that the C-series has used for a while, while the 77 and 83-inch models now use the Primary Tandem RGB 2.0 OLED panel that's also used in the LG G6. These two models now go under a different name as a result: the LG C6H.

The C6 has impressed me in the time I’ve been testing it. Here are my top three things I like about it, and one area where it could be better.

A solid brightness boost

The C6 (left) gets a nice brightness boost in peak and fullscreen areas that make its pictures appear brighter, shown here in a scene from Wicked, when compared to the C5 (right) (Image credit: Universal Pictures / Future)

I measured the LG C5 last year at 1,180 nits peak HDR brightness (measured on a 10% window in Filmmaker Mode), and I was pleased with the moderate boost in brightness over the C4 (which clocked in at 1,065 nits with the same tests). It gave highlights and peak brightness areas on screen that little extra pop.

This year, the C6 has provided an even bigger brightness boost, clocking in at 1,438 nits peak HDR brightness (10% window) in Filmmaker Mode. This makes a huge difference in high contrast scenes. In movies like The Batman and Dark City, you can see what the extra brightness has done with lamps in dark-lit hallways, making them bolder and, in turn, delivering stronger perceived contrast.

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