If you’ve noticed that Dolby Vision content on your LG C5 OLED or LG G5 OLED suddenly looks brighter than it did a week ago — you’re not imagining things.
Something definitely changed: This week, LG deployed software update 33.30.92 for its 2025 OLED TV models that brings with it, among other things, enhanced brightness for Dolby Vision HDR content.
OLED owners on Reddit noticed the change immediately and were quick to post the surprising before and after photos:
Before vs After Results : LG G5 Dolby Vision brightness update (33.30.92) from r/LG_UserHub
The future is bright
What’s interesting is the timing of the update — we’re only about a month and a half away from the launch of LG’s new 2026 models, the LG C6 and G6 OLED.
Is it possible that engineers were able to take some of the learnings from the new TVs and roll them back to the 2025 models? Absolutely, but there’s no way for us to know for sure.
What we can say is that, in our own lab testing, we measured the G5’s peak brightness at 2,295 nits in a 10% window. It's always had the physical capability to go brighter with Dolby Vision content, but there was something in the encoding that prevented it. The same is true, to a lesser extent, for the LG C5 OLED that put out 1,165 nits under the same conditions.
Unfortunately, no LG B5 OLED owners have come forward to mention any improvement on their sets, and that could be down to the fact that the B5 maxed out at just 632 nits in a 10% window. A boost in HDR brightness might not do much to change that.
Now, I think there will still be good reason to buy the new 2026 models — just see our guides to the LG C5 vs C6 and LG G5 vs G6 for a complete rundown— but the latest update could give folks on the fence a reason to save some money by buying last year’s suddenly improved screens.
We're keen to get them into our labs for testing, so stay tuned for more.
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