The Vizio OLED’s SDR peak brightness is unremarkable, similar to the LG BX OLED. It gets bright enough to combat some glare but large areas get noticeably more dim due to the aggressive ‘Automatic Brightness Limiter’ (ABL).
If you leave a static image on the TV for more than five minutes the screen automatically dims itself, and it returns to normal when you press any button on the remote. Unfortunately, there’s no setting to control it.
We encountered a problem with the Peak Luminance setting. If you make any change to it, it resets the screen’s brightness to the max, even if you have the Luminance setting at ‘0’. The brightness returns to normal once you make any adjustment to the Luminance setting.
We measured peak brightness after calibration in the ‘Calibrated Dark’ Picture Mode with Gamma set to ‘2.2’, Color Temperature set to ‘Warm’, Peak Luminance on ‘High’, and Luminance at its max. We got a brighter image before calibration, about 30 nits brighter in the smaller test windows, but the 50% and 100% windows were brighter after calibration. However, your experience may vary.
If you want the brightest image possible. we got 479 cd/m² in the 2% window test in the ‘Vivid’ Picture Mode with Color Temperature set to ‘Cool’, Peak Luminance on ‘High’, and Luminance at its max.