I have the LG um7100 tv and when I’m calibrating SDR I can clearly see that the TV almost perfectly follow the BT1886 curve without much effort of calibrating when it’s on 100 nits.
But when I’m reading around I do read that I should use the 2.4 power gamma and is that correct?
Also according to the reading I should use 2.2 gamma on the day mode?
BT.1886 is the correct gamma to use on an LCD for a night mode compared to 2.4 power gamma, as BT.1886 accounts for back light bleeding through on your TV on a black test pattern. On an OLED, it doesn't matter, as BT.1886 and 2.4 gamma will end up exactly the same, as a black test pattern on OLED looks the same as the TV turned off.