Yes, I felt the same way when going from LCD (LG G6) to my first AMOLED device (S10+). Most of my reading is late at night, just before sleeping, and now I feel much less eye fatigue after reading. Agree on cflumen. It's the best light filtering app I've used. The root method worked great on my V10, until I upgraded its OS (can't remember the version) and lost root. Then I switched to the non-root method, but it didn't work so well. IIRC it was mostly an overlay applied system-wide. Luckily my next devices (G6 and S10+) have built-in light filters and white balance. It's not so comprehensive as cf.lumen (can't go full red on the screen, for example) but it's enough to make my reading enjoyable.