How to use this result
The original Drift Light idea was memorable because it did not ask the user to manage a complex system. The lamp simply drifted down toward bedtime. This simulator keeps that simple visual rhythm and lets you preview the timings.
Use it to match the fade to a real bedtime, not to chase a perfect brightness number. The useful cue is the repeated transition from normal evening light to a lower, quieter bedroom state.
The curve is a routine aid, not a calibrated lighting instrument.
Best use
Run the tool, choose one change, repeat it for two or three nights, then compare the room notes. A repeated pattern is more useful than one perfect-looking number.
