How calibration works
What the app is comparing, and how long it takes to settle.
What it compares
Your nightly sleep quality against what the lamps actually did that evening — brightness and colour temperature over time, not what was scheduled.
How long it takes
About two weeks of nights before it will change anything. Individual light sensitivity varies more than fiftyfold between people, so a small sample tells it very little.
What it will not do
It will not diagnose anything, and it is not a medical assessment. It adjusts a lighting curve.