RTINGS measured the LG C5’s peak brightness at 800 nits (per RTINGS) versus 500 nits for the Hisense U6K (per RTINGS). The C5 achieved an ∞:1 contrast ratio (per RTINGS) while the U6K recorded 3,500:1. In gaming tests, Tom’s Hardware recorded 9 ms input lag on the C5 compared with 15 ms on the U6K, giving the OLED a clear edge for fast‑action titles.
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