Help me figure out when to utilize ISF Dark vs ISF Bright on my OLED please! *pics*

[jcp42877]

Close to 100 views in the Home Theater discussion board and not a damn reply...so I'll try on this board instead..

So I've followed Steve Withers setup steps for my LG B6 OLED and have even asked around to a few other owners on message boards that also use a variation of Steve's settings, and most come to the conclusion the ISF Dark Room and Bright Room are the best settings to use, whether watching movies, playing games, etc (of course HDR settings will kick in when playing HDR content, but that hasn't troubled me as much).

My problem is, I can't decide which setting to use given my entertainment setup. I have pictures included of multiple different 'scenarios', but based on mass user standards, what makes my room too bright to use ISF Dark Room, and what makes it too dark to use ISF Bright Room?


These were all taken around 1:15 PM Hawaii time...the curtains are navy blue, but a cheaper quality, so that's why light is bleeding through. My phone makes it look brighter than it actually is. They are VERY concealing at night when the sun sets.


Here is living room with kitchen light and LR light on:


Living room with only kitchen light on:


Living room with lights off besides Christmas tree (forgive the brightness of the lights, it is actually much darker in the room than it appears):


Living room with lights off and curtains/blinds cracked open a bit:


And finally living room with lights off, Christmas tree off, and curtains shut again:

I'm currently playing with all lights off besides the tree, curtains/blinds closed, using ISF Dark, but the picture still seems a bit too dark....are my surroundings considered too bright to merit ISF Dark, and I should switch to ISF Bright?

It's probably all based on my own viewing experience, but I still have trouble deciding which setting to alternate between, given time of day, and other lighting in the area. After spending $2250, I want the best possible picture around the clock. Any thoughts are appreciated!