Red-toned lamps have become common in bedrooms. It is worth being clear about what they are and are not.
The idea
Bright light in the evening, especially light with a strong blue component, is stimulating. A dim, warm or red-toned light lets you see without the same effect, which is why it appears as a night light or bedside lamp.
Brightness matters more than colour
A very bright red light is still a bright light. The dimmest setting that lets you move around safely is the useful one.
What it will not do
A lamp is not a treatment. Claims that a light will resolve a sleep disorder should be treated with caution, and persistent sleep problems are a matter for a clinician rather than a purchase.
Practical uses
Night feeds, a landing light, or reading briefly without fully waking yourself. Those are the jobs it does well.