LUMEN exists because “it's probably just eye fatigue” wasn't an acceptable answer. Some screens caused strain within minutes; others could be used all day. The spec sheets looked identical. The difference had to live somewhere — so we went looking for it in the signal itself: GPU registers, link formats, panel behavior, backlight modulation.
What we found is that most of what hurts is invisible and unlisted: temporal dithering enabled by default, PWM at frequencies chosen for cost, 6-bit panels sold as 8-bit, drivers silently changing color range between versions. None of it is on the box. All of it is measurable.
The rules this site runs on
- Measure first. Claims about flicker and dithering are testable. We test them.
- Lived use second. A device isn't “restful” until it survives months of real work.
- No spec-sheet reviews. If we haven't touched it or measured it, it isn't in the guide.
- Practice what we preach. This site uses warm paper tones, real dark mode, and no flashing motion.
Get in touch
Device reports, corrections, and measurement ideas are all welcome — the community reports under each device are the heart of the guide.