A 2016 study by the University of California (Berkeley) suggests that the subjectively perceived visual enhancement with common contrast source material levels off at about 60 LCD local dimming zones.

In 2025 RTINGS.com found in accelerated longevity tests that edge-lit TVs were more prone to quicker failure than direct-lit panels (especially during non-stop usage) due to the heat of the LEDs being more concentrated and intense than direct-lit panels, making them more prone to panel cracking and warping