Kd-43x8300c

The TV has a button on the remote (or in quick settings). Instead of manually tweaking brightness/contrast, choose:

43-inch LCD with Edge LED backlighting and a 3840 x 2160 native resolution. kd-43x8300c

Verdict: Use HDR only if you must. SDR calibration provides a much more balanced image. The TV has a button on the remote (or in quick settings)