The LG NANO81 has a disappointing SDR peak brightness. This TV doesn’t get very bright, not enough to combat glare in bright rooms. For the most part, its brightness remains consistent with varied content.
We measured the brightness after calibration in the ‘Expert (Dark Mode)’ Picture Mode, with Local Dimming on ‘Medium’, Backlight set to ‘Max’, and the Color Temperature set to ‘Warm 2’.
If you don’t care about image accuracy and want the brightest image possible, set the Picture Mode to ‘Vivid’ with the Local Dimming on ‘High’ and Backlight to ‘Max’. We were able to get 504 nits on the 2% peak window test.