Will a motion-sensor night light wake light sleepers?

It depends on the lumen output and how warm the light is. Reviewers across the candidates we read note that very bright motion-triggered models (100+ lumens) can be jarring at 3 a.m., while dim, dimmable, warm-white units in the 1–30 lumen range tend to be tolerated even by partners still in bed. Look for adjustable brightness and a warm 2700K color temperature if a sleeping partner is a concern.