The second beta of macOS 26.2 introduces a new Edge Light feature that's designed for video calls on FaceTime and other video ...
Go to Settings > Display & Brightness > Brightness > True Tone and toggle it on. This setting is switched on by default, but if you accidentally disabled it before, you can always find it in Settings.
With a few quick tweaks, you can make sure your modern TV uses only the power it needs - even as today's models grow more efficient.