- Edited
The new setup with bias lighting I described has lasted. I can now go for a long time without very noticeable eye strain. The setup again: https://www.amazon.com/dp/B098SWWGJB top bezel mounted bar light set to warm and max brightness, https://www.amazon.com/dp/B07S5ZLP3B LED strips on back of monitor, set to orange/red button in bottom right at max brightness. The colors don't actually match with the buttons for most of them but there are lots of color options. There is a lamp with a warm 2700K bulb and warm shade a few feet behind me to my left. The Acer Nitro KG241Y Sbiip is 2-3 feet away from my eyes depending on if I'm leaning forward or back. I have tan/off-white curtains. The Samsung 2494HM is mounted to the right of the Acer, both 1080p 24". I have the Acer set to 22 brightness with the Samsung at minimum brightness. The Acer seems no worse between minimum and mid-range brightness. I'm still using my normal close-range glasses.